diff --git a/Cargo.toml b/Cargo.toml
index 771cf1c..7528f71 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,5 @@
 [package]
-name = "tea"
+name = "matcha"
 version = "0.1.0"
 edition = "2024"
 
diff --git a/src/interpret/opchain.rs b/src/interpret/opchain.rs
new file mode 100644
index 0000000..4ff9751
--- /dev/null
+++ b/src/interpret/opchain.rs
@@ -0,0 +1,10 @@
+
+use crate::parse::ASTNode;
+
+fn get_domain(ast: &mut Vec<ASTNode>) -> Vec<ASTNode> {
+	ast.iter().take_while(|x| !matches!(x, ASTNode::StatementEnd)).cloned().collect()
+}
+
+pub fn operator_chain(ast: &mut Vec<ASTNode>) {
+	let tree = get_domain(ast);
+}
diff --git a/src/lex/operator.rs b/src/lex/operator.rs
index c67a811..9241339 100644
--- a/src/lex/operator.rs
+++ b/src/lex/operator.rs
@@ -8,6 +8,15 @@ pub enum Operator {
 	Slash, // division
 }
 
+impl Operator {
+	pub fn get_precedence(&self) -> usize {
+		match self {
+			Operator::Plus | Operator::Minus => 0,
+			Operator::Star | Operator::Slash => 1,
+		}
+	}
+}
+
 pub fn parse_operator(input: &str) -> Option<(Token, &str)> {
 	let c: char = input.chars().next()?;
 	let input = &input[1..];
diff --git a/src/parse.rs b/src/parse.rs
index f5d1336..91c0336 100644
--- a/src/parse.rs
+++ b/src/parse.rs
@@ -45,14 +45,14 @@ macro_rules! match_or_return {
 	}
 }
 
-macro_rules! assert_match {
+/*macro_rules! assert_match {
 	($matchee:expr, $pattern:pat, $ret:expr) => {
 		match $matchee {
 			Some($pattern) => (),
 			_ => return Err($ret),
 		}
 	}
-}
+}*/
 
 fn next_expr_end(tokens: &[Token]) -> usize {
 	let mut index = 0;
@@ -86,9 +86,15 @@ fn next_block_end(tokens: &[Token]) -> Result<usize, ParseError> {
 fn parse_expr(tokens: &[Token]) -> Result<(Vec<ASTNode>, usize), ParseError> {
 	let mut ast = vec![];
 	let mut index = 0;
+	let mut op_stack: Vec<Operator> = vec![];
 	loop {
 		match tokens.get(index) {
-			None => return Ok((ast, index)),
+			None => {
+				while !op_stack.is_empty() {
+					ast.push(ASTNode::BinOp(op_stack.pop().unwrap()));
+				}
+				return Ok((ast, index));
+			}
 			Some(Token::Lit(v)) => ast.push(ASTNode::Val(Value::Lit(v.clone()))),
 			Some(Token::Id(v)) => ast.push(ASTNode::Val(Value::Id(v.clone()))),
 			Some(Token::Kw(Keyword::Let)) => {
@@ -125,10 +131,25 @@ fn parse_expr(tokens: &[Token]) -> Result<(Vec<ASTNode>, usize), ParseError> {
 				return Err(ParseError::new("unexpected }"));
 			},
 			Some(Token::Sym(Symbol::Semicolon)) => {
+				while !op_stack.is_empty() {
+					ast.push(ASTNode::BinOp(op_stack.pop().unwrap()));
+				}
 				ast.push(ASTNode::StatementEnd);
 			},
 			Some(Token::Op(op)) => {
-				if ast.is_empty() && matches!(op, Operator::Minus) {
+				match op_stack.last() {
+					None => op_stack.push(op.clone()),
+					Some(last_op) if last_op.get_precedence() < op.get_precedence() => {
+						op_stack.push(op.clone())
+					},
+					Some(_) => {
+						while op_stack.last().is_some_and(|l| l.get_precedence() < op.get_precedence()) {
+							ast.push(ASTNode::BinOp(op_stack.pop().unwrap()));
+						}
+						op_stack.push(op.clone())
+					}
+				}
+				/*if ast.is_empty() && matches!(op, Operator::Minus) {
 					ast.push(match tokens.get(index + 1) {
 						Some(Token::Id(v)) => ASTNode::Val(Value::Id(v.clone())),
 						Some(Token::Lit(v)) => ASTNode::Val(Value::Lit(v.clone())),
@@ -145,7 +166,8 @@ fn parse_expr(tokens: &[Token]) -> Result<(Vec<ASTNode>, usize), ParseError> {
 					});
 					ast.push(ASTNode::BinOp(op.clone()));
 					index += 1;
-				}
+				}*/
+				
 			},
 		}
 		index += 1;
diff --git a/test.tea b/test.matcha
similarity index 100%
rename from test.tea
rename to test.matcha