diff --git a/src/rpn.rs b/src/rpn.rs
index c7a261d..16ba94f 100644
--- a/src/rpn.rs
+++ b/src/rpn.rs
@@ -94,9 +94,9 @@ fn str_to_calc_type(string: &str) -> Option<CalcType> {
 
 	match string {
 		"+" => Some(Add),
-		"-" => Some(Subtract),
-		"*" => Some(Multiply),
-		"/" => Some(Divide),
+		"-" | "−" => Some(Subtract),
+		"*" | "×" => Some(Multiply),
+		"/" | "÷" => Some(Divide),
 		"^" => Some(Power),
 		"//" => Some(Floor),
 		"%" => Some(Modulo),
@@ -145,19 +145,19 @@ fn eval(
 			},
 			_ => {
 				let (x, y) = (
-					&stack.pop_back().unwrap(),
-					&stack.pop_back().unwrap(),
+					stack.pop_back().unwrap(),
+					stack.pop_back().unwrap(),
 				);
 
 				match op {
-					Add => &stack.push_back(y + x),
-					Subtract => &stack.push_back(y - x),
-					Multiply => &stack.push_back(y * x),
-					Divide => &stack.push_back(y / x),
-					Power => &stack.push_back(x.powf(*y)),
-					Floor => &stack.push_back((y / x).floor()),
-					Modulo => &stack.push_back(y % x),
-					_ => &{},
+					Add => stack.push_back(y + x),
+					Subtract => stack.push_back(y - x),
+					Multiply => stack.push_back(y * x),
+					Divide => stack.push_back(y / x),
+					Power => stack.push_back(x.powf(y)),
+					Floor => stack.push_back((y / x).floor()),
+					Modulo => stack.push_back(y % x),
+					_ => {},
 				};
 			},
 		};