diff --git a/src/lib.rs b/src/lib.rs
index 691daea..d7a323a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -28,35 +28,16 @@ enum TokenType {
     Equal(),
 }
 
-struct Rational {
+struct _Rational {
     numerator: i128,
     denominator: i128,
 }
 
-struct GaussianRational {
-    real: Rational,
-    imaginary: Rational,
+struct _GaussianRational {
+    real: _Rational,
+    imaginary: _Rational,
 }
 
-/*
-   fn tokenize(query: &str) -> Result<Vec<Token>, Box<dyn Error>> {
-   let mut tokens: Vec<Token> = vec![];
-
-   for token in query.split(" ") {
-   tokens.push(match token {
-   "*" => Token::Multiply(),
-   "+" => Token::Add(),
-   "-" => Token::Substract(),
-   "=" => Token::Equal(),
-   _ if token.starts_with("X^") => Token::Exponent(token[2..].parse()?),
-   _ => Token::Number(token.parse()?),
-   });
-   }
-
-   Ok(tokens)
-   }
-   */
-
 fn check_number(my_string: String, i: usize) -> Result<Token, String> {
     println!("Checking number at index {i}");
     if my_string.as_str() == "." {
@@ -218,13 +199,13 @@ fn sanitize_tokens(tokens: Vec<Token>) -> Result<Vec<Token>, String> {
         if let Some(last_token_type) = last_token_type {
             match (&last_token_type, &token_type) {
                 (TokenType::Number(), TokenType::Variable()) => sanitized_tokens.push(Token::Multiplication()),
-                (TokenType::Variable(), TokenType::Number()) => sanitized_tokens.push(Token::Multiplication()),
                 (TokenType::Number(), TokenType::ImaginaryUnit()) => sanitized_tokens.push(Token::Multiplication()),
+                (TokenType::Number(), TokenType::OpenParenthesis()) => sanitized_tokens.push(Token::Multiplication()),
+                (TokenType::Variable(), TokenType::Number()) => sanitized_tokens.push(Token::Multiplication()),
+                (TokenType::Variable(), TokenType::ImaginaryUnit()) => sanitized_tokens.push(Token::Multiplication()),
+                (TokenType::Variable(), TokenType::OpenParenthesis()) => sanitized_tokens.push(Token::Multiplication()),
                 (TokenType::ImaginaryUnit(), TokenType::Number()) => sanitized_tokens.push(Token::Multiplication()),
                 (TokenType::ImaginaryUnit(), TokenType::Variable()) => sanitized_tokens.push(Token::Multiplication()),
-                (TokenType::Variable(), TokenType::ImaginaryUnit()) => sanitized_tokens.push(Token::Multiplication()),
-                (TokenType::Number(), TokenType::OpenParenthesis()) => sanitized_tokens.push(Token::Multiplication()),
-                (TokenType::Variable(), TokenType::OpenParenthesis()) => sanitized_tokens.push(Token::Multiplication()),
                 (TokenType::ImaginaryUnit(), TokenType::OpenParenthesis()) => sanitized_tokens.push(Token::Multiplication()),
                 (TokenType::CloseParenthesis(), TokenType::OpenParenthesis()) => sanitized_tokens.push(Token::Multiplication()),
                 (TokenType::CloseParenthesis(), TokenType::Number()) => sanitized_tokens.push(Token::Multiplication()),
@@ -268,49 +249,19 @@ fn sanitize_tokens(tokens: Vec<Token>) -> Result<Vec<Token>, String> {
     Ok(sanitized_tokens)
 }
 
-/*
-   pub fn parse(query: &str) -> Result<Vec<f64>, Box<dyn Error>> {
-   let tokens = tokenize(query)?;
+struct Node {
+    _lhs: Option<Box<Node>>,
+    _rhs: Option<Box<Node>>,
+}
 
-   let mut degree: Option<usize> = None;
-   for token in tokens {
-   match token {
-   Token::Exponent(n) => {
-   if degree == None || degree < Some(n) {
-   degree = Some(n);
-   }
-   }
-   _ => (),
-   }
-   }
-
-   let mut results: Vec<f64> = vec![0.; degree.unwrap() + 1];
-   let tokens = tokenize(query)?;
-   let mut sign = 1.;
-   let mut left = 1.;
-   let mut constant = 0.;
-   for token in tokens {
-   match token {
-   Token::Add() => sign = 1.,
-   Token::Substract() => sign = -1.,
-   Token::Multiply() => (),
-   Token::Equal() => {
-   left = -1.;
-   sign = 1.
-   },
-   Token::Number(n) => constant = n,
-   Token::Exponent(e) => results[e] += sign * left * constant,
-   }
-   }
-
-   Ok(results)
-   }
-   */
+fn build_ast(_tokens: Vec<Token>) -> Node {
+    Node { _lhs: None, _rhs: None }
+}
 
 pub fn parse(query: &str) -> Result<Vec<f64>, Box<dyn Error>> {
     let tokens = tokenize(query)?;
     let sanitized_tokens = sanitize_tokens(tokens)?;
-    //let ast = build_ast(tokens);
+    let _ast = build_ast(sanitized_tokens);
 
     println!("{:?}", tokenize(query));
 
@@ -937,45 +888,6 @@ mod tests {
 
     }
 
-    /*
-       #[test]
-       fn tokenize_exponent() {
-       let query = "X^3";
-       let result: Vec<Token> = vec![Token::Exponent(3)];
-
-       assert_eq!(tokenize(query).unwrap(), result);
-       }
-       */
-
-    /*
-       #[test]
-       fn tokenize_constant() {
-       let query = "6.964";
-       let result: Vec<Token> = vec![Token::Number(6.964)];
-
-       assert_eq!(tokenize(query).unwrap(), result);
-       }
-       */
-
-    /*
-       #[test]
-       fn tokenize_complex() {
-       let query = "8 * X^0 - 6 * X^1 + 0 * X^2 - 5.6 * X^3 = 3 * X^0";
-       let result: Vec<Token> = vec![
-       Token::Number(8.), Token::Multiplication(), Token::Exponentiation(),
-       Token::Substract(),
-       Token::Number(6.), Token::Multiply(), Token::Exponentiation(),
-       Token::Add(),
-       Token::Number(0.), Token::Multiply(), Token::Exponent(2),
-       Token::Substract(),
-       Token::Number(5.6), Token::Multiply(), Token::Exponent(3),
-       Token::Equal(),
-       Token::Number(3.), Token::Multiply(), Token::Exponent(0)];
-
-       assert_eq!(tokenize(query).unwrap(), result);
-       }
-       */
-
 #[test]
     fn parse_degree_0() {
         let query = "5 * X^0 = 3 * X^0";