diff --git a/tests/src/overall/approximate/ApproximateTests.cpp b/tests/src/overall/approximate/ApproximateTests.cpp
index 2a8b330a5..84667b46d 100644
--- a/tests/src/overall/approximate/ApproximateTests.cpp
+++ b/tests/src/overall/approximate/ApproximateTests.cpp
@@ -211,183 +211,345 @@ TEST(ApproximateTests, approximateTest) {
 }
 
 TEST(ApproximateTests, approxamateExtremumsTest) {
-  EXPECT_EQ(approximate(Expression("sqr(ln(2)^10000000000000)")).toString(), "0.0");
-  EXPECT_EQ(approximate(Expression("root(ln(2)^10000000000000, 3)")).toString(), "0.0");
-  EXPECT_EQ(approximate(Expression("sin(ln(2)^10000000000000)")).toString(), "0.0");
-  EXPECT_EQ(approximate(Expression("cos(ln(2)^10000000000000)")).toString(), "1.0");
-  EXPECT_EQ(approximate(Expression("tan(ln(2)^10000000000000)")).toString(), "0.0");
-  EXPECT_EQ(approximate(Expression("cot(ln(2)^10000000000000)")).toString(), "cot(0.0)");
-  EXPECT_EQ(approximate(Expression("sec(ln(2)^10000000000000)")).toString(), "1.0");
-  EXPECT_EQ(approximate(Expression("csc(ln(2)^10000000000000)")).toString(), "csc(0.0)");
-  EXPECT_EQ(approximate(Expression("asin(ln(2)^10000000000000)")).toString(), "0.0");
-  EXPECT_EQ(approximate(Expression("acos(ln(2)^10000000000000)")).toString(), "1.5707963267948966192");
-  EXPECT_EQ(approximate(Expression("atan(ln(2)^10000000000000)")).toString(), "0.0");
-  EXPECT_EQ(approximate(Expression("acot(ln(2)^10000000000000)")).toString(), "acot(0.0)");
-  EXPECT_EQ(approximate(Expression("asec(ln(2)^10000000000000)")).toString(), "asec(0.0)");
-  EXPECT_EQ(approximate(Expression("acsc(ln(2)^10000000000000)")).toString(), "acsc(0.0)");
-  EXPECT_EQ(approximate(Expression("sinh(ln(2)^10000000000000)")).toString(), "0.0");
-  EXPECT_EQ(approximate(Expression("cosh(ln(2)^10000000000000)")).toString(), "1.0");
-  EXPECT_EQ(approximate(Expression("tanh(ln(2)^10000000000000)")).toString(), "0.0");
-  EXPECT_EQ(approximate(Expression("coth(ln(2)^10000000000000)")).toString(), "coth(0.0)");
-  EXPECT_EQ(approximate(Expression("sech(ln(2)^10000000000000)")).toString(), "1.0");
-  EXPECT_EQ(approximate(Expression("csch(ln(2)^10000000000000)")).toString(), "csch(0.0)");
-  EXPECT_EQ(approximate(Expression("asinh(ln(2)^10000000000000)")).toString(), "0.0");
-  EXPECT_EQ(approximate(Expression("acosh(ln(2)^10000000000000)")).toString(), "acosh(0.0)");
-  EXPECT_EQ(approximate(Expression("atanh(ln(2)^10000000000000)")).toString(), "0.0");
-  EXPECT_EQ(approximate(Expression("acoth(ln(2)^10000000000000)")).toString(), "acoth(0.0)");
-  EXPECT_EQ(approximate(Expression("asech(ln(2)^10000000000000)")).toString(), "asech(0.0)");
-  EXPECT_EQ(approximate(Expression("acsch(ln(2)^10000000000000)")).toString(), "acsch(0.0)");
+  EXPECT_EQ(approximate(Expression("sqr(ln(2)^10000000000000)")).toString(),
+            "0.0");
+  EXPECT_EQ(approximate(Expression("root(ln(2)^10000000000000, 3)")).toString(),
+            "0.0");
+  EXPECT_EQ(approximate(Expression("sin(ln(2)^10000000000000)")).toString(),
+            "0.0");
+  EXPECT_EQ(approximate(Expression("cos(ln(2)^10000000000000)")).toString(),
+            "1.0");
+  EXPECT_EQ(approximate(Expression("tan(ln(2)^10000000000000)")).toString(),
+            "0.0");
+  EXPECT_EQ(approximate(Expression("cot(ln(2)^10000000000000)")).toString(),
+            "cot(0.0)");
+  EXPECT_EQ(approximate(Expression("sec(ln(2)^10000000000000)")).toString(),
+            "1.0");
+  EXPECT_EQ(approximate(Expression("csc(ln(2)^10000000000000)")).toString(),
+            "csc(0.0)");
+  EXPECT_EQ(approximate(Expression("asin(ln(2)^10000000000000)")).toString(),
+            "0.0");
+  EXPECT_EQ(approximate(Expression("acos(ln(2)^10000000000000)")).toString(),
+            "1.5707963267948966192");
+  EXPECT_EQ(approximate(Expression("atan(ln(2)^10000000000000)")).toString(),
+            "0.0");
+  EXPECT_EQ(approximate(Expression("acot(ln(2)^10000000000000)")).toString(),
+            "acot(0.0)");
+  EXPECT_EQ(approximate(Expression("asec(ln(2)^10000000000000)")).toString(),
+            "asec(0.0)");
+  EXPECT_EQ(approximate(Expression("acsc(ln(2)^10000000000000)")).toString(),
+            "acsc(0.0)");
+  EXPECT_EQ(approximate(Expression("sinh(ln(2)^10000000000000)")).toString(),
+            "0.0");
+  EXPECT_EQ(approximate(Expression("cosh(ln(2)^10000000000000)")).toString(),
+            "1.0");
+  EXPECT_EQ(approximate(Expression("tanh(ln(2)^10000000000000)")).toString(),
+            "0.0");
+  EXPECT_EQ(approximate(Expression("coth(ln(2)^10000000000000)")).toString(),
+            "coth(0.0)");
+  EXPECT_EQ(approximate(Expression("sech(ln(2)^10000000000000)")).toString(),
+            "1.0");
+  EXPECT_EQ(approximate(Expression("csch(ln(2)^10000000000000)")).toString(),
+            "csch(0.0)");
+  EXPECT_EQ(approximate(Expression("asinh(ln(2)^10000000000000)")).toString(),
+            "0.0");
+  EXPECT_EQ(approximate(Expression("acosh(ln(2)^10000000000000)")).toString(),
+            "acosh(0.0)");
+  EXPECT_EQ(approximate(Expression("atanh(ln(2)^10000000000000)")).toString(),
+            "0.0");
+  EXPECT_EQ(approximate(Expression("acoth(ln(2)^10000000000000)")).toString(),
+            "acoth(0.0)");
+  EXPECT_EQ(approximate(Expression("asech(ln(2)^10000000000000)")).toString(),
+            "asech(0.0)");
+  EXPECT_EQ(approximate(Expression("acsch(ln(2)^10000000000000)")).toString(),
+            "acsch(0.0)");
 
-  EXPECT_EQ(approximate(Expression("sqrt(-ln(2)^10000000000000)")).toString(), "sqrt(-0.0)");
-  EXPECT_EQ(approximate(Expression("root(-ln(2)^10000000000000, 3)")).toString(), "root(-0.0, 3)");
-  EXPECT_EQ(approximate(Expression("sin(-ln(2)^10000000000000)")).toString(), "-0.0");
-  EXPECT_EQ(approximate(Expression("cos(-ln(2)^10000000000000)")).toString(), "1.0");
-  EXPECT_EQ(approximate(Expression("tan(-ln(2)^10000000000000)")).toString(), "-0.0");
-  EXPECT_EQ(approximate(Expression("cot(-ln(2)^10000000000000)")).toString(), "-cot(0.0)");
-  EXPECT_EQ(approximate(Expression("sec(-ln(2)^10000000000000)")).toString(), "1.0");
-  EXPECT_EQ(approximate(Expression("csc(-ln(2)^10000000000000)")).toString(), "-csc(0.0)");
-  EXPECT_EQ(approximate(Expression("asin(-ln(2)^10000000000000)")).toString(), "-0.0");
-  EXPECT_EQ(approximate(Expression("acos(-ln(2)^10000000000000)")).toString(), "1.5707963267948966192");
-  EXPECT_EQ(approximate(Expression("atan(-ln(2)^10000000000000)")).toString(), "-0.0");
-  EXPECT_EQ(approximate(Expression("acot(-ln(2)^10000000000000)")).toString(), "acot(-0.0)");
-  EXPECT_EQ(approximate(Expression("asec(-ln(2)^10000000000000)")).toString(), "asec(-0.0)");
-  EXPECT_EQ(approximate(Expression("acsc(-ln(2)^10000000000000)")).toString(), "acsc(-0.0)");
-  EXPECT_EQ(approximate(Expression("sinh(-ln(2)^10000000000000)")).toString(), "-0.0");
-  EXPECT_EQ(approximate(Expression("cosh(-ln(2)^10000000000000)")).toString(), "1.0");
-  EXPECT_EQ(approximate(Expression("tanh(-ln(2)^10000000000000)")).toString(), "-0.0");
-  EXPECT_EQ(approximate(Expression("coth(-ln(2)^10000000000000)")).toString(), "-coth(0.0)");
-  EXPECT_EQ(approximate(Expression("sech(-ln(2)^10000000000000)")).toString(), "1.0");
-  EXPECT_EQ(approximate(Expression("csch(-ln(2)^10000000000000)")).toString(), "-csch(0.0)");
-  EXPECT_EQ(approximate(Expression("asinh(-ln(2)^10000000000000)")).toString(), "-0.0");
-  EXPECT_EQ(approximate(Expression("acosh(-ln(2)^10000000000000)")).toString(), "acosh(-0.0)");
-  EXPECT_EQ(approximate(Expression("atanh(-ln(2)^10000000000000)")).toString(), "-0.0");
-  EXPECT_EQ(approximate(Expression("acoth(-ln(2)^10000000000000)")).toString(), "acoth(-0.0)");
-  EXPECT_EQ(approximate(Expression("asech(-ln(2)^10000000000000)")).toString(), "asech(-0.0)");
-  EXPECT_EQ(approximate(Expression("acsch(-ln(2)^10000000000000)")).toString(), "acsch(-0.0)");
+  EXPECT_EQ(approximate(Expression("sqrt(-ln(2)^10000000000000)")).toString(),
+            "sqrt(-0.0)");
+  EXPECT_EQ(approximate(Expression("root(-ln(2)^10000000000000, 3)")).toString(),
+            "root(-0.0, 3)");
+  EXPECT_EQ(approximate(Expression("sin(-ln(2)^10000000000000)")).toString(),
+            "-0.0");
+  EXPECT_EQ(approximate(Expression("cos(-ln(2)^10000000000000)")).toString(),
+            "1.0");
+  EXPECT_EQ(approximate(Expression("tan(-ln(2)^10000000000000)")).toString(),
+            "-0.0");
+  EXPECT_EQ(approximate(Expression("cot(-ln(2)^10000000000000)")).toString(),
+            "-cot(0.0)");
+  EXPECT_EQ(approximate(Expression("sec(-ln(2)^10000000000000)")).toString(),
+            "1.0");
+  EXPECT_EQ(approximate(Expression("csc(-ln(2)^10000000000000)")).toString(),
+            "-csc(0.0)");
+  EXPECT_EQ(approximate(Expression("asin(-ln(2)^10000000000000)")).toString(),
+            "-0.0");
+  EXPECT_EQ(approximate(Expression("acos(-ln(2)^10000000000000)")).toString(),
+            "1.5707963267948966192");
+  EXPECT_EQ(approximate(Expression("atan(-ln(2)^10000000000000)")).toString(),
+            "-0.0");
+  EXPECT_EQ(approximate(Expression("acot(-ln(2)^10000000000000)")).toString(),
+            "acot(-0.0)");
+  EXPECT_EQ(approximate(Expression("asec(-ln(2)^10000000000000)")).toString(),
+            "asec(-0.0)");
+  EXPECT_EQ(approximate(Expression("acsc(-ln(2)^10000000000000)")).toString(),
+            "acsc(-0.0)");
+  EXPECT_EQ(approximate(Expression("sinh(-ln(2)^10000000000000)")).toString(),
+            "-0.0");
+  EXPECT_EQ(approximate(Expression("cosh(-ln(2)^10000000000000)")).toString(),
+            "1.0");
+  EXPECT_EQ(approximate(Expression("tanh(-ln(2)^10000000000000)")).toString(),
+            "-0.0");
+  EXPECT_EQ(approximate(Expression("coth(-ln(2)^10000000000000)")).toString(),
+            "-coth(0.0)");
+  EXPECT_EQ(approximate(Expression("sech(-ln(2)^10000000000000)")).toString(),
+            "1.0");
+  EXPECT_EQ(approximate(Expression("csch(-ln(2)^10000000000000)")).toString(),
+            "-csch(0.0)");
+  EXPECT_EQ(approximate(Expression("asinh(-ln(2)^10000000000000)")).toString(),
+            "-0.0");
+  EXPECT_EQ(approximate(Expression("acosh(-ln(2)^10000000000000)")).toString(),
+            "acosh(-0.0)");
+  EXPECT_EQ(approximate(Expression("atanh(-ln(2)^10000000000000)")).toString(),
+            "-0.0");
+  EXPECT_EQ(approximate(Expression("acoth(-ln(2)^10000000000000)")).toString(),
+            "acoth(-0.0)");
+  EXPECT_EQ(approximate(Expression("asech(-ln(2)^10000000000000)")).toString(),
+            "asech(-0.0)");
+  EXPECT_EQ(approximate(Expression("acsch(-ln(2)^10000000000000)")).toString(),
+            "acsch(-0.0)");
 
-  EXPECT_EQ(approximate(Expression("floor(ln(2)^10000000000000)")).toString(), "floor(0.0)");
-  EXPECT_EQ(approximate(Expression("ceil(ln(2)^10000000000000)")).toString(), "ceil(0.0)");
-  EXPECT_EQ(approximate(Expression("sign(ln(2)^10000000000000)")).toString(), "1");
-  EXPECT_EQ(approximate(Expression("floor(1 - ln(2)^10000000000000)")).toString(), "-ceil(-1.0)");
-  EXPECT_EQ(approximate(Expression("ceil(1 - ln(2)^10000000000000)")).toString(), "-floor(-1.0)");
-  EXPECT_EQ(approximate(Expression("sign(1 - ln(2)^10000000000000)")).toString(), "1");
+  EXPECT_EQ(approximate(Expression("floor(ln(2)^10000000000000)")).toString(),
+            "floor(0.0)");
+  EXPECT_EQ(approximate(Expression("ceil(ln(2)^10000000000000)")).toString(),
+            "ceil(0.0)");
+  EXPECT_EQ(approximate(Expression("sign(ln(2)^10000000000000)")).toString(),
+            "1");
+  EXPECT_EQ(approximate(Expression("floor(1 - ln(2)^10000000000000)")).toString(),
+            "-ceil(-1.0)");
+  EXPECT_EQ(approximate(Expression("ceil(1 - ln(2)^10000000000000)")).toString(),
+            "-floor(-1.0)");
+  EXPECT_EQ(approximate(Expression("sign(1 - ln(2)^10000000000000)")).toString(),
+            "1");
 
-  EXPECT_EQ(approximate(Expression("floor(ln(2)^10000000000000 * sin(4))")).toString(), "floor(-0.0)");
-  EXPECT_EQ(approximate(Expression("ceil(ln(2)^10000000000000 * sin(4))")).toString(), "ceil(-0.0)");
-  EXPECT_EQ(approximate(Expression("sign(ln(2)^10000000000000 * sin(4))")).toString(), "-1");
-  EXPECT_EQ(approximate(Expression("floor(1 - ln(2)^10000000000000 * sin(4))")).toString(), "-ceil(-1.0)");
-  EXPECT_EQ(approximate(Expression("ceil(1 - ln(2)^10000000000000 * sin(4))")).toString(), "-floor(-1.0)");
-  EXPECT_EQ(approximate(Expression("sign(1 - ln(2)^10000000000000 * sin(4))")).toString(), "1");
+  EXPECT_EQ(approximate(Expression("floor(ln(2)^10000000000000 * sin(4))")).toString(),
+            "floor(-0.0)");
+  EXPECT_EQ(approximate(Expression("ceil(ln(2)^10000000000000 * sin(4))")).toString(),
+            "ceil(-0.0)");
+  EXPECT_EQ(approximate(Expression("sign(ln(2)^10000000000000 * sin(4))")).toString(),
+            "-1");
+  EXPECT_EQ(approximate(Expression("floor(1 - ln(2)^10000000000000 * sin(4))")).toString(),
+            "-ceil(-1.0)");
+  EXPECT_EQ(approximate(Expression("ceil(1 - ln(2)^10000000000000 * sin(4))")).toString(),
+            "-floor(-1.0)");
+  EXPECT_EQ(approximate(Expression("sign(1 - ln(2)^10000000000000 * sin(4))")).toString(),
+            "1");
 
-  EXPECT_EQ(approximate(Expression("floor(ln(2)^10000000000000 * (sin(4) + 1 - 1))")).toString(), "floor(-0.0)");
-  EXPECT_EQ(approximate(Expression("ceil(ln(2)^10000000000000 * (sin(4) + 1 - 1))")).toString(), "ceil(-0.0)");
-  EXPECT_EQ(approximate(Expression("sign(ln(2)^10000000000000 * (sin(4) + 1 - 1))")).toString(), "-1");
-  EXPECT_EQ(approximate(Expression("floor(1 - ln(2)^10000000000000 * (sin(4) + 1 - 1))")).toString(), "-ceil(-1.0)");
-  EXPECT_EQ(approximate(Expression("ceil(1 - ln(2)^10000000000000 * (sin(4) + 1 - 1))")).toString(), "-floor(-1.0)");
-  EXPECT_EQ(approximate(Expression("sign(1 - ln(2)^10000000000000 * (sin(4) + 1 - 1))")).toString(), "1");
+  EXPECT_EQ(approximate(Expression("floor(ln(2)^10000000000000 * (sin(4) + 1 - 1))")).toString(),
+            "floor(-0.0)");
+  EXPECT_EQ(approximate(Expression("ceil(ln(2)^10000000000000 * (sin(4) + 1 - 1))")).toString(),
+            "ceil(-0.0)");
+  EXPECT_EQ(approximate(Expression("sign(ln(2)^10000000000000 * (sin(4) + 1 - 1))")).toString(),
+            "-1");
+  EXPECT_EQ(approximate(Expression("floor(1 - ln(2)^10000000000000 * (sin(4) + 1 - 1))")).toString(),
+            "-ceil(-1.0)");
+  EXPECT_EQ(approximate(Expression("ceil(1 - ln(2)^10000000000000 * (sin(4) + 1 - 1))")).toString(),
+            "-floor(-1.0)");
+  EXPECT_EQ(approximate(Expression("sign(1 - ln(2)^10000000000000 * (sin(4) + 1 - 1))")).toString(),
+            "1");
 
-  EXPECT_EQ(approximate(Expression("floor(ln(2)^10000000000000 * (2sin(4) - sin(4)))")).toString(), "floor(-0.0)");
-  EXPECT_EQ(approximate(Expression("ceil(ln(2)^10000000000000 * (2sin(4) - sin(4)))")).toString(), "ceil(-0.0)");
-  EXPECT_EQ(approximate(Expression("sign(ln(2)^10000000000000 * (2sin(4) - sin(4)))")).toString(), "-1");
-  EXPECT_EQ(approximate(Expression("floor(1 - ln(2)^10000000000000 * (2sin(4) - sin(4)))")).toString(), "-ceil(-1.0)");
-  EXPECT_EQ(approximate(Expression("ceil(1 - ln(2)^10000000000000 * (2sin(4) - sin(4)))")).toString(), "-floor(-1.0)");
-  EXPECT_EQ(approximate(Expression("sign(1 - ln(2)^10000000000000 * (2sin(4) - sin(4)))")).toString(), "1");
+  EXPECT_EQ(approximate(Expression("floor(ln(2)^10000000000000 * (2sin(4) - sin(4)))")).toString(),
+            "floor(-0.0)");
+  EXPECT_EQ(approximate(Expression("ceil(ln(2)^10000000000000 * (2sin(4) - sin(4)))")).toString(),
+            "ceil(-0.0)");
+  EXPECT_EQ(approximate(Expression("sign(ln(2)^10000000000000 * (2sin(4) - sin(4)))")).toString(),
+            "-1");
+  EXPECT_EQ(approximate(Expression("floor(1 - ln(2)^10000000000000 * (2sin(4) - sin(4)))")).toString(),
+            "-ceil(-1.0)");
+  EXPECT_EQ(approximate(Expression("ceil(1 - ln(2)^10000000000000 * (2sin(4) - sin(4)))")).toString(),
+            "-floor(-1.0)");
+  EXPECT_EQ(approximate(Expression("sign(1 - ln(2)^10000000000000 * (2sin(4) - sin(4)))")).toString(),
+            "1");
 
-  EXPECT_EQ(approximate(Expression("floor(ln(2)^10000000000000 / sin(4))")).toString(), "floor(-0.0)");
-  EXPECT_EQ(approximate(Expression("ceil(ln(2)^10000000000000 / sin(4))")).toString(), "ceil(-0.0)");
-  EXPECT_EQ(approximate(Expression("sign(ln(2)^10000000000000 / sin(4))")).toString(), "-1");
-  EXPECT_EQ(approximate(Expression("floor(1 - ln(2)^10000000000000 / sin(4))")).toString(), "-ceil(-1.0)");
-  EXPECT_EQ(approximate(Expression("ceil(1 - ln(2)^10000000000000 / sin(4))")).toString(), "-floor(-1.0)");
-  EXPECT_EQ(approximate(Expression("sign(1 - ln(2)^10000000000000 / sin(4))")).toString(), "1");
+  EXPECT_EQ(approximate(Expression("floor(ln(2)^10000000000000 / sin(4))")).toString(),
+            "floor(-0.0)");
+  EXPECT_EQ(approximate(Expression("ceil(ln(2)^10000000000000 / sin(4))")).toString(),
+            "ceil(-0.0)");
+  EXPECT_EQ(approximate(Expression("sign(ln(2)^10000000000000 / sin(4))")).toString(),
+            "-1");
+  EXPECT_EQ(approximate(Expression("floor(1 - ln(2)^10000000000000 / sin(4))")).toString(),
+            "-ceil(-1.0)");
+  EXPECT_EQ(approximate(Expression("ceil(1 - ln(2)^10000000000000 / sin(4))")).toString(),
+            "-floor(-1.0)");
+  EXPECT_EQ(approximate(Expression("sign(1 - ln(2)^10000000000000 / sin(4))")).toString(),
+            "1");
 
-  EXPECT_EQ(approximate(Expression("floor(ln(2)^10000000000000 / (sin(4) + 1 - 1))")).toString(), "floor(-0.0)");
-  EXPECT_EQ(approximate(Expression("ceil(ln(2)^10000000000000 / (sin(4) + 1 - 1))")).toString(), "ceil(-0.0)");
-  EXPECT_EQ(approximate(Expression("sign(ln(2)^10000000000000 / (sin(4) + 1 - 1))")).toString(), "-1");
-  EXPECT_EQ(approximate(Expression("floor(1 - ln(2)^10000000000000 / (sin(4) + 1 - 1))")).toString(), "-ceil(-1.0)");
-  EXPECT_EQ(approximate(Expression("ceil(1 - ln(2)^10000000000000 / (sin(4) + 1 - 1))")).toString(), "-floor(-1.0)");
-  EXPECT_EQ(approximate(Expression("sign(1 - ln(2)^10000000000000 / (sin(4) + 1 - 1))")).toString(), "1");
+  EXPECT_EQ(approximate(Expression("floor(ln(2)^10000000000000 / (sin(4) + 1 - 1))")).toString(),
+            "floor(-0.0)");
+  EXPECT_EQ(approximate(Expression("ceil(ln(2)^10000000000000 / (sin(4) + 1 - 1))")).toString(),
+            "ceil(-0.0)");
+  EXPECT_EQ(approximate(Expression("sign(ln(2)^10000000000000 / (sin(4) + 1 - 1))")).toString(),
+            "-1");
+  EXPECT_EQ(approximate(Expression("floor(1 - ln(2)^10000000000000 / (sin(4) + 1 - 1))")).toString(),
+            "-ceil(-1.0)");
+  EXPECT_EQ(approximate(Expression("ceil(1 - ln(2)^10000000000000 / (sin(4) + 1 - 1))")).toString(),
+            "-floor(-1.0)");
+  EXPECT_EQ(approximate(Expression("sign(1 - ln(2)^10000000000000 / (sin(4) + 1 - 1))")).toString(),
+            "1");
 
-  EXPECT_EQ(approximate(Expression("floor(ln(2)^10000000000000 / (2sin(4) - sin(4)))")).toString(), "floor(-0.0)");
-  EXPECT_EQ(approximate(Expression("ceil(ln(2)^10000000000000 / (2sin(4) - sin(4)))")).toString(), "ceil(-0.0)");
-  EXPECT_EQ(approximate(Expression("sign(ln(2)^10000000000000 / (2sin(4) - sin(4)))")).toString(), "-1");
-  EXPECT_EQ(approximate(Expression("floor(1 - ln(2)^10000000000000 / (2sin(4) - sin(4)))")).toString(), "-ceil(-1.0)");
-  EXPECT_EQ(approximate(Expression("ceil(1 - ln(2)^10000000000000 / (2sin(4) - sin(4)))")).toString(), "-floor(-1.0)");
-  EXPECT_EQ(approximate(Expression("sign(1 - ln(2)^10000000000000 / (2sin(4) - sin(4)))")).toString(), "1");
+  EXPECT_EQ(approximate(Expression("floor(ln(2)^10000000000000 / (2sin(4) - sin(4)))")).toString(),
+            "floor(-0.0)");
+  EXPECT_EQ(approximate(Expression("ceil(ln(2)^10000000000000 / (2sin(4) - sin(4)))")).toString(),
+            "ceil(-0.0)");
+  EXPECT_EQ(approximate(Expression("sign(ln(2)^10000000000000 / (2sin(4) - sin(4)))")).toString(),
+            "-1");
+  EXPECT_EQ(approximate(Expression("floor(1 - ln(2)^10000000000000 / (2sin(4) - sin(4)))")).toString(),
+            "-ceil(-1.0)");
+  EXPECT_EQ(approximate(Expression("ceil(1 - ln(2)^10000000000000 / (2sin(4) - sin(4)))")).toString(),
+            "-floor(-1.0)");
+  EXPECT_EQ(approximate(Expression("sign(1 - ln(2)^10000000000000 / (2sin(4) - sin(4)))")).toString(),
+            "1");
 
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 = 0")).toString(), "False");
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 != 0")).toString(), "True");
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 < 0")).toString(), "False");
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 > 0")).toString(), "True");
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 <= 0")).toString(), "False");
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 >= 0")).toString(), "True");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 = 0")).toString(), "False");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 != 0")).toString(), "True");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 < 0")).toString(), "True");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 > 0")).toString(), "False");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 <= 0")).toString(), "True");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 >= 0")).toString(), "False");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 = 0")).toString(),
+            "False");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 != 0")).toString(),
+            "True");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 < 0")).toString(),
+            "False");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 > 0")).toString(),
+            "True");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 <= 0")).toString(),
+            "False");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 >= 0")).toString(),
+            "True");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 = 0")).toString(),
+            "False");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 != 0")).toString(),
+            "True");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 < 0")).toString(),
+            "True");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 > 0")).toString(),
+            "False");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 <= 0")).toString(),
+            "True");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 >= 0")).toString(),
+            "False");
 
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 = ln(2)^100000000")).toString(), "False");
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 != ln(2)^100000000")).toString(), "True");
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 < ln(2)^100000000")).toString(), "True");
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 > ln(2)^100000000")).toString(), "False");
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 <= ln(2)^100000000")).toString(), "True");
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 >= ln(2)^100000000")).toString(), "False");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 = ln(2)^100000000")).toString(), "False");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 != ln(2)^100000000")).toString(), "True");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 < ln(2)^100000000")).toString(), "True");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 > ln(2)^100000000")).toString(), "False");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 <= ln(2)^100000000")).toString(), "True");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 >= ln(2)^100000000")).toString(), "False");
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 = -ln(2)^100000000")).toString(), "False");
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 != -ln(2)^100000000")).toString(), "True");
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 < -ln(2)^100000000")).toString(), "False");
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 > -ln(2)^100000000")).toString(), "True");
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 <= -ln(2)^100000000")).toString(), "False");
-  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 >= -ln(2)^100000000")).toString(), "True");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 = -ln(2)^100000000")).toString(), "False");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 != -ln(2)^100000000")).toString(), "True");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 < -ln(2)^100000000")).toString(), "False");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 > -ln(2)^100000000")).toString(), "True");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 <= -ln(2)^100000000")).toString(), "False");
-  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 >= -ln(2)^100000000")).toString(), "True");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 = ln(2)^100000000")).toString(),
+            "False");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 != ln(2)^100000000")).toString(),
+            "True");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 < ln(2)^100000000")).toString(),
+            "True");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 > ln(2)^100000000")).toString(),
+            "False");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 <= ln(2)^100000000")).toString(),
+            "True");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 >= ln(2)^100000000")).toString(),
+            "False");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 = ln(2)^100000000")).toString(),
+            "False");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 != ln(2)^100000000")).toString(),
+            "True");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 < ln(2)^100000000")).toString(),
+            "True");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 > ln(2)^100000000")).toString(),
+            "False");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 <= ln(2)^100000000")).toString(),
+            "True");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 >= ln(2)^100000000")).toString(),
+            "False");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 = -ln(2)^100000000")).toString(),
+            "False");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 != -ln(2)^100000000")).toString(),
+            "True");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 < -ln(2)^100000000")).toString(),
+            "False");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 > -ln(2)^100000000")).toString(),
+            "True");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 <= -ln(2)^100000000")).toString(),
+            "False");
+  EXPECT_EQ(approximate(Expression("ln(2)^10000000000000 >= -ln(2)^100000000")).toString(),
+            "True");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 = -ln(2)^100000000")).toString(),
+            "False");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 != -ln(2)^100000000")).toString(),
+            "True");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 < -ln(2)^100000000")).toString(),
+            "False");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 > -ln(2)^100000000")).toString(),
+            "True");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 <= -ln(2)^100000000")).toString(),
+            "False");
+  EXPECT_EQ(approximate(Expression("-ln(2)^10000000000000 >= -ln(2)^100000000")).toString(),
+            "True");
 
-  EXPECT_EQ(approximate(Expression("1 / (1 - tanh(11^10))")).toString(), "cosh(25937424601)/(cosh(25937424601) - sinh(25937424601))");
-  EXPECT_EQ(approximate(Expression("1 / (1 - coth(11^10))")).toString(), "sinh(25937424601)/(sinh(25937424601) - cosh(25937424601))");
-  EXPECT_EQ(approximate(Expression("1 / (ln(2)^10000000000000)")).toString(), "1/0.0");
+  EXPECT_EQ(approximate(Expression("1 / (1 - tanh(11^10))")).toString(),
+            "cosh(25937424601)/(cosh(25937424601) - sinh(25937424601))");
+  EXPECT_EQ(approximate(Expression("1 / (1 - coth(11^10))")).toString(),
+            "sinh(25937424601)/(sinh(25937424601) - cosh(25937424601))");
+  EXPECT_EQ(approximate(Expression("1 / (ln(2)^10000000000000)")).toString(),
+            "1/0.0");
 }
 
 TEST(ApproximateTests, approximateWithPrecisionTest) {
-  EXPECT_EQ(approximate(Expression("123"), 2).toString(), "1.2*10^2");
-  EXPECT_EQ(approximate(Expression("123"), 3).toString(), "123");
-  EXPECT_EQ(approximate(Expression("999"), 2).toString(), "1.0*10^3");
-  EXPECT_EQ(approximate(Expression("999"), 3).toString(), "999");
-  EXPECT_EQ(approximate(Expression("1000"), 3).toString(), "1.0*10^3");
-  EXPECT_EQ(approximate(Expression("1000"), 4).toString(), "1000");
-  EXPECT_EQ(approximate(Expression("2/3"), 0).toString(), "0.7");
-  EXPECT_EQ(approximate(Expression("2/3"), 1).toString(), "0.7");
-  EXPECT_EQ(approximate(Expression("2/3"), 2).toString(), "0.67");
-  EXPECT_EQ(approximate(Expression("10^10000"), 8).toString(), "1.0*10^10000");
-  EXPECT_EQ(approximate(Expression("9^10000"), 8).toString(), "2.6613034*10^9542");
-  EXPECT_EQ(approximate(Expression("sin(E)"), 16).toString(), "0.4107812905029087");
-  EXPECT_EQ(approximate(Expression("sin(E)"), 100).toString(), "0.4107812905029086954760094920183605918883069703934153453045716588061351824376549958759786190454355935");
-  EXPECT_EQ(approximate(Expression("sin(E)"), 500).toString(), "0.41078129050290869547600949201836059188830697039341534530457165880613518243765499587597861904543559353998291725993302611025612058214980807451386832166444404531330197030068700843779775501870429268806003976547248700619445558784780526262698913892212813629990839737608068439105974107056580477820375774780424366945910698422961638162689359340566062721679765484253127451162965356964229969288617282831139369276388867344864990496109344825533823527519982767717612020764891885643060371919941565596238925522726933");
-  EXPECT_EQ(approximate(Expression("sin(E)"), 1000).toString(), "0.410781290502908695476009492018360591888306970393415345304571658806135182437654995875978619045435593539982917259933026110256120582149808074513868321664444045313301970300687008437797755018704292688060039765472487006194455587847805262626989138922128136299908397376080684391059741070565804778203757747804243669459106984229616381626893593405660627216797654842531274511629653569642299692886172828311393692763888673448649904961093448255338235275199827677176120207648918856430603719199415655962389255227269329528247477565374084254456845493070521764653289529029121531798267980455224152201783074312455247443118659121061166824975283442729765920066115702948819794373441039363621507249342167892877264237554995364981898784098244975928739908684886687169561527095433756282781475277781538970397993742686571201323888405828052948752757923286033258285782682064914566808696556377856800938584299870591049139758903145979548061988835578438108419199725833087967291498589345414792089183496072498118579415411402320500775908443");
-  EXPECT_EQ(approximate(Expression("sin(sin(E))"), 30).toString(), "0.39932574404189139297067052142");
-  EXPECT_EQ(approximate(Expression("(sqrt(2) + 1)^2"), 5).toString(), "5.8284");
-  EXPECT_EQ(approximate(Expression("E/I"), 5).toString(), "-2.7183 I");
-  EXPECT_EQ(approximate(Expression("E/-I"), 5).toString(), "2.7183 I");
-  EXPECT_EQ(approximate(Expression("x+E"), 8).toString(), "x + 2.7182818");
-  EXPECT_EQ(approximate(Expression("x^(100!)"), 8).toString(), "x^(9.3326215*10^157)");
-  EXPECT_EQ(approximate(Expression("2^200/x"), 10).toString(), "(1.606938044*10^60)/x");
-  EXPECT_EQ(approximate(Expression("x/2^200"), 10).toString(), "6.223015278*10^-61 x");
-  EXPECT_EQ(approximate(Expression("(sqrt(2) - a - 1)^2"), 5).toString(), "a^2 - 0.82843 a + 0.17157");
-  EXPECT_EQ(approximate(Expression("2 sqrt2 sin3 a + 3 ln5 root(2, 3) b"), 5).toString(), "0.39915 a + 6.0833 b");
+  EXPECT_EQ(approximate(Expression("123"), 2).toString(),
+            "1.2*10^2");
+  EXPECT_EQ(approximate(Expression("123"), 3).toString(),
+            "123");
+  EXPECT_EQ(approximate(Expression("999"), 2).toString(),
+            "1.0*10^3");
+  EXPECT_EQ(approximate(Expression("999"), 3).toString(),
+            "999");
+  EXPECT_EQ(approximate(Expression("1000"), 3).toString(),
+            "1.0*10^3");
+  EXPECT_EQ(approximate(Expression("1000"), 4).toString(),
+            "1000");
+  EXPECT_EQ(approximate(Expression("2/3"), 0).toString(),
+            "0.7");
+  EXPECT_EQ(approximate(Expression("2/3"), 1).toString(),
+            "0.7");
+  EXPECT_EQ(approximate(Expression("2/3"), 2).toString(),
+            "0.67");
+  EXPECT_EQ(approximate(Expression("10^10000"), 8).toString(),
+            "1.0*10^10000");
+  EXPECT_EQ(approximate(Expression("9^10000"), 8).toString(),
+            "2.6613034*10^9542");
+  EXPECT_EQ(approximate(Expression("sin(E)"), 16).toString(),
+            "0.4107812905029087");
+  EXPECT_EQ(approximate(Expression("sin(E)"), 100).toString(),
+            "0.4107812905029086954760094920183605918883069703934153453045716588061351824376549958759786190454355935");
+  EXPECT_EQ(approximate(Expression("sin(E)"), 500).toString(),
+            "0.41078129050290869547600949201836059188830697039341534530457165880613518243765499587597861904543559353998291725993302611025612058214980807451386832166444404531330197030068700843779775501870429268806003976547248700619445558784780526262698913892212813629990839737608068439105974107056580477820375774780424366945910698422961638162689359340566062721679765484253127451162965356964229969288617282831139369276388867344864990496109344825533823527519982767717612020764891885643060371919941565596238925522726933");
+  EXPECT_EQ(approximate(Expression("sin(E)"), 1000).toString(),
+            "0.410781290502908695476009492018360591888306970393415345304571658806135182437654995875978619045435593539982917259933026110256120582149808074513868321664444045313301970300687008437797755018704292688060039765472487006194455587847805262626989138922128136299908397376080684391059741070565804778203757747804243669459106984229616381626893593405660627216797654842531274511629653569642299692886172828311393692763888673448649904961093448255338235275199827677176120207648918856430603719199415655962389255227269329528247477565374084254456845493070521764653289529029121531798267980455224152201783074312455247443118659121061166824975283442729765920066115702948819794373441039363621507249342167892877264237554995364981898784098244975928739908684886687169561527095433756282781475277781538970397993742686571201323888405828052948752757923286033258285782682064914566808696556377856800938584299870591049139758903145979548061988835578438108419199725833087967291498589345414792089183496072498118579415411402320500775908443");
+  EXPECT_EQ(approximate(Expression("sin(sin(E))"), 30).toString(),
+            "0.39932574404189139297067052142");
+  EXPECT_EQ(approximate(Expression("(sqrt(2) + 1)^2"), 5).toString(),
+            "5.8284");
+  EXPECT_EQ(approximate(Expression("E/I"), 5).toString(),
+            "-2.7183 I");
+  EXPECT_EQ(approximate(Expression("E/-I"), 5).toString(),
+            "2.7183 I");
+  EXPECT_EQ(approximate(Expression("x+E"), 8).toString(),
+            "x + 2.7182818");
+  EXPECT_EQ(approximate(Expression("x^(100!)"), 8).toString(),
+            "x^(9.3326215*10^157)");
+  EXPECT_EQ(approximate(Expression("2^200/x"), 10).toString(),
+            "(1.606938044*10^60)/x");
+  EXPECT_EQ(approximate(Expression("x/2^200"), 10).toString(),
+            "6.223015278*10^-61 x");
+  EXPECT_EQ(approximate(Expression("(sqrt(2) - a - 1)^2"), 5).toString(),
+            "a^2 - 0.82843 a + 0.17157");
+  EXPECT_EQ(approximate(Expression("2 sqrt2 sin3 a + 3 ln5 root(2, 3) b"), 5).toString(),
+            "0.39915 a + 6.0833 b");
 
-  EXPECT_EQ(approximate(approximate(Expression("sin(5)"), 100), 5).toString(), "-0.95892");
-  EXPECT_EQ(approximate(approximate(Expression("sin(5) I"), 100), 5).toString(), "-0.95892 I");
-  EXPECT_EQ(approximate(approximate(Expression("I + sin(4)"), 100), 5).toString(), "-0.7568 + I");
-  EXPECT_EQ(approximate(approximate(Expression("sin(5) I + sin(4)"), 100), 5).toString(), "-0.7568 - 0.95892 I");
+  EXPECT_EQ(approximate(approximate(Expression("sin(5)"), 100), 5).toString(),
+            "-0.95892");
+  EXPECT_EQ(approximate(approximate(Expression("sin(5) I"), 100), 5).toString(),
+            "-0.95892 I");
+  EXPECT_EQ(approximate(approximate(Expression("I + sin(4)"), 100), 5).toString(),
+            "-0.7568 + I");
+  EXPECT_EQ(approximate(approximate(Expression("sin(5) I + sin(4)"), 100), 5).toString(),
+            "-0.7568 - 0.95892 I");
 
   {
     Expression expr = approximate(Expression("cos(5)"), 56);