diff --git a/test-files/programs/basic_note/BNOTECE.8xp b/test-files/programs/basic_note/BNOTECE.8xp
new file mode 100644
index 0000000..11fbaf2
Binary files /dev/null and b/test-files/programs/basic_note/BNOTECE.8xp differ
diff --git a/test-files/programs/basic_note/BNOTECE2.8xp b/test-files/programs/basic_note/BNOTECE2.8xp
new file mode 100644
index 0000000..84fd065
Binary files /dev/null and b/test-files/programs/basic_note/BNOTECE2.8xp differ
diff --git a/ti-basic-optimizer/src/parse/components/data_access.rs b/ti-basic-optimizer/src/parse/components/data_access.rs
index 179e640..d60f030 100644
--- a/ti-basic-optimizer/src/parse/components/data_access.rs
+++ b/ti-basic-optimizer/src/parse/components/data_access.rs
@@ -7,6 +7,8 @@ use crate::parse::{
 use crate::Config;
 use titokens::{Token, Tokens};
 
+use super::EquationName;
+
 #[derive(Debug, Clone)]
 pub enum ListIndexable {
     List(ListName),
@@ -179,3 +181,48 @@ impl Reconstruct for ListIndex {
         data
     }
 }
+
+#[derive(Clone, Debug)]
+pub struct EquationIndex {
+    pub subject: EquationName,
+    pub index: Box<Expression>,
+}
+
+impl EquationIndex {
+    pub fn parse(
+        subject: EquationName,
+        token: Token,
+        more: &mut Tokens,
+    ) -> Result<Option<Self>, TokenReport> {
+        if token != Token::OneByte(0x10) {
+            return Ok(None);
+        }
+
+        let index = expect_some!(
+            Expression::parse(next_or_err!(more)?, more)?,
+            more,
+            "an expression",
+            "This is a equation invocation and equation invocations require an index."
+        )?;
+
+        if more.peek() == Some(Token::OneByte(0x11)) {
+            more.next();
+        }
+
+        Ok(Some(EquationIndex {
+            subject,
+            index: Box::new(index),
+        }))
+    }
+}
+
+impl Reconstruct for EquationIndex {
+    fn reconstruct(&self, config: &Config) -> Vec<Token> {
+        let mut data = self.subject.reconstruct(config);
+        data.push(Token::OneByte(0x10));
+        data.extend(self.index.reconstruct(config));
+        data.push(Token::OneByte(0x11));
+
+        data
+    }
+}
diff --git a/ti-basic-optimizer/src/parse/components/mod.rs b/ti-basic-optimizer/src/parse/components/mod.rs
index 18d4f6f..2715cad 100644
--- a/ti-basic-optimizer/src/parse/components/mod.rs
+++ b/ti-basic-optimizer/src/parse/components/mod.rs
@@ -1,7 +1,7 @@
 use crate::error_reporting::TokenReport;
 pub use crate::parse::components::{
     binary_operator::BinOp,
-    data_access::{ListIndex, ListIndexable, MatrixIndex, MatrixIndexable},
+    data_access::{EquationIndex, ListIndex, ListIndexable, MatrixIndex, MatrixIndexable},
     delvar_target::DelVarTarget,
     equation_name::EquationName,
     function_call::FunctionCall,
@@ -73,9 +73,11 @@ pub enum Operand {
     NumericVarName(NumericVarName),
     ListName(ListName),
     MatrixName(MatrixName),
+    StringName(StringName),
+    EquationName(EquationName),
     ListAccess(ListIndex),
     MatrixAccess(MatrixIndex),
-    StringName(StringName),
+    EquationAccess(EquationIndex),
     Ans,
     I,
     GetKey,
@@ -132,6 +134,20 @@ impl Parse for Operand {
                     Ok(None)
                 }
             }
+            Token::TwoByte(0x5E, 0x10..=0x2B | 0x40..=0x45 | 0x80..=0x82) => {
+                if let Some(name) = EquationName::parse(token, more)? {
+                    if more.peek() == Some(Token::OneByte(0x10)) {
+                        Ok(
+                            EquationIndex::parse(name, more.next().unwrap(), more)?
+                                .map(Self::EquationAccess),
+                        )
+                    } else {
+                        Ok(Some(Self::EquationName(name)))
+                    }
+                } else {
+                    Ok(None)
+                }
+            }
             Token::TwoByte(0x63, 0x2A) => Ok(Some(Self::TblInput)), // todo: TblIndex(n) list access
             Token::TwoByte(0x63, 0x00..=0x2A | 0x32..=0x38) => {
                 Ok(WindowVarName::parse(token, more)?.map(Self::WindowVarName))
@@ -147,9 +163,11 @@ impl Reconstruct for Operand {
             Operand::NumericVarName(x) => x.reconstruct(config),
             Operand::ListName(x) => x.reconstruct(config),
             Operand::MatrixName(x) => x.reconstruct(config),
+            Operand::StringName(x) => x.reconstruct(config),
+            Operand::EquationName(x) => x.reconstruct(config),
             Operand::ListAccess(x) => x.reconstruct(config),
             Operand::MatrixAccess(x) => x.reconstruct(config),
-            Operand::StringName(x) => x.reconstruct(config),
+            Operand::EquationAccess(x) => x.reconstruct(config),
             Operand::Ans => vec![Token::OneByte(0x72)],
             Operand::I => vec![Token::OneByte(0x2C)],
             Operand::GetKey => vec![Token::OneByte(0xAD)],
diff --git a/ti-basic-optimizer/src/parse/expression.rs b/ti-basic-optimizer/src/parse/expression.rs
index 8768a7c..6878e1b 100644
--- a/ti-basic-optimizer/src/parse/expression.rs
+++ b/ti-basic-optimizer/src/parse/expression.rs
@@ -120,11 +120,12 @@ impl<'a> Builder<'a> {
 
             if let Some(Token::OneByte(0x10)) = self.tokens.peek() {
                 // (
-                match &operand {
-                    Operand::Ans => {
-                        unimplemented!()
-                    }
-                    _ => {}
+                if let Operand::Ans = &operand {
+                    Err(TokenReport::new(
+                        self.tokens.current_position(),
+                        "Unsupported Ans( operation",
+                        None,
+                    ))?
                 }
             }