diff --git a/src/ts/process/infunctions.ts b/src/ts/process/infunctions.ts
index 71262537..80045d42 100644
--- a/src/ts/process/infunctions.ts
+++ b/src/ts/process/infunctions.ts
@@ -17,12 +17,12 @@ function toRPN(expression:string) {
     };
 
     expression = expression.replace(/\s+/g, '');
-    let expression2 = expression.split(/([\+\-\*\/\^\%\>\<])/).filter(token => token);
+    let expression2 = expression.split(/([\+\-\*\/\^\%\>\<\|\&])/).filter(token => token);
 
     expression2.forEach(token => {
         if (parseFloat(token) || token === '0') {
             outputQueue += token + ' ';
-        } else if ('+-*/^%><'.includes(token)) {
+        } else if ('+-*/^%><|&'.includes(token)) {
             while (operatorStack.length > 0 &&
             ((operators[token].associativity === 'Left' &&
             operators[token].precedence <= operators[operatorStack[operatorStack.length - 1]].precedence) ||