diff --git a/assets/js/footer-functions.js b/assets/js/footer-functions.js
index 3587073..90295cf 100644
--- a/assets/js/footer-functions.js
+++ b/assets/js/footer-functions.js
@@ -9,72 +9,62 @@ subtractionAndMultiplicationTest();
 subtractionAndDivisonTest();
 allOperatorTest();
 
-
-
-
 function additionTest() {
-    testCompute(2, "1+1");
-    testCompute(3, "1+1+1");
-    testCompute(6, "3+2+1");
+  testCompute(2, "1+1");
+  testCompute(3, "1+1+1");
+  testCompute(6, "3+2+1");
 }
 
 function subtractionTest() {
-    testCompute(0, "1-1");
-    testCompute(-1, "1-1-1");
-    testCompute(2, "5-2-1");
+  testCompute(0, "1-1");
+  testCompute(-1, "1-1-1");
+  testCompute(2, "5-2-1");
 }
 
 function multiplicationTest() {
-    testCompute(1, "1*1");
-    testCompute(2, "1*1*2");
-    testCompute(50, "5*5*2");
+  testCompute(1, "1*1");
+  testCompute(2, "1*1*2");
+  testCompute(50, "5*5*2");
 }
 
 function divisionTest() {
-    testCompute(1, "1/1");
-    testCompute(1, "10/2/5");
-    testCompute(10, "20/2");
+  testCompute(1, "1/1");
+  testCompute(1, "10/2/5");
+  testCompute(10, "20/2");
 }
 
-
 function additionAndSubtractionTest() {
-    testCompute(0, "1+1-2");
-    testCompute(15, "10+6-1");
-    testCompute(20, "10-2+12");
+  testCompute(0, "1+1-2");
+  testCompute(15, "10+6-1");
+  testCompute(20, "10-2+12");
 }
 
-
 function additionAndMultiplicationTest() {
-    testCompute(0, "1+1*2");
-    testCompute(16, "10+6*1");
-    testCompute(34, "10+2*12");
+  testCompute(3, "1+1*2");
+  testCompute(16, "10+6*1");
+  testCompute(34, "10+2*12");
 }
 
 function subtractionAndMultiplicationTest() {
-    testCompute(-1, "1-1*2");
-    testCompute(4, "10-6*1");
-    testCompute(-14, "10-2*12");
+  testCompute(-1, "1-1*2");
+  testCompute(4, "10-6*1");
+  testCompute(-14, "10-2*12");
 }
 
-
-
-
-
 function additionAndDivisonTest() {
-    testCompute(1.5, "1+1/2");
-    testCompute(16, "10+6/1");
-    testCompute(10.5, "10+2/4");
+  testCompute(1.5, "1+1/2");
+  testCompute(16, "10+6/1");
+  testCompute(10.5, "10+2/4");
 }
 
 function subtractionAndDivisonTest() {
-    testCompute(0.5, "1-1/2");
-    testCompute(4, "10-6/1");
-    testCompute(9.5, "10-2/4");
+  testCompute(0.5, "1-1/2");
+  testCompute(4, "10-6/1");
+  testCompute(9.5, "10-2/4");
 }
 
-
 function allOperatorTest() {
-    testCompute(-12, "1+2-3*10/2");
-    testCompute(-11, "1+3-3*10/2");
-    testCompute(-4, "3-2-3*10/2+10");
-}
\ No newline at end of file
+  testCompute(-12, "1+2-3*10/2");
+  testCompute(-11, "1+3-3*10/2");
+  testCompute(-4, "3-2-3*10/2+10");
+}
diff --git a/assets/js/numbers.js b/assets/js/numbers.js
index 5a925a6..6a77b78 100644
--- a/assets/js/numbers.js
+++ b/assets/js/numbers.js
@@ -1,3 +1,113 @@
 function compute(expression) {
-    // TODO - write method definition here
-}
\ No newline at end of file
+  //1. Split each char into an array
+  // Input "3-2-3*10/2+10"
+  //   var charactersToProcess = [
+  //     "3",
+  //     "-",
+  //     "2",
+  //     "-",
+  //     "3",
+  //     "*",
+  //     "10",
+  //     "/",
+  //     "2",
+  //     "+",
+  //     "10"
+  //   ];
+
+  var charactersToProcess = expression
+    // RegEx helper
+    .replace(/\'/g, "")
+    .split(/(\d+)/)
+    .filter(Boolean);
+
+  //2. Process Multiplication and Division Operations remove them from remaining chars and aggregate total
+  while (
+    charactersToProcess.indexOf("*") !== -1 ||
+    charactersToProcess.indexOf("/") !== -1
+  ) {
+    var opearandIndex = charactersToProcess.indexOf("*");
+    if (charactersToProcess[opearandIndex] == "*") {
+      var firstOperandIndex = opearandIndex - 1;
+      var secondOperandIndex = opearandIndex + 1;
+      var result =
+        parseFloat(charactersToProcess[firstOperandIndex]) *
+        parseFloat(charactersToProcess[secondOperandIndex]);
+
+      charactersToProcess.splice(firstOperandIndex, 3, result);
+      //   debugger;
+      // console.log(result);
+    }
+    opearandIndex = "";
+    opearandIndex = charactersToProcess.indexOf("/");
+    if (charactersToProcess[opearandIndex] == "/") {
+      firstOperandIndex = opearandIndex - 1;
+      secondOperandIndex = opearandIndex + 1;
+      result =
+        parseFloat(charactersToProcess[firstOperandIndex]) /
+        parseFloat(charactersToProcess[secondOperandIndex]);
+
+      charactersToProcess.splice(firstOperandIndex, 3, result);
+      //   debugger;
+      //   console.log(result);
+    }
+  }
+
+  while (
+    charactersToProcess.indexOf("+") !== -1 ||
+    charactersToProcess.indexOf("-") !== -1
+  ) {
+    addOpearandIndex = charactersToProcess.indexOf("+");
+    subOpearandIndex = charactersToProcess.indexOf("-");
+
+    if (
+      addOpearandIndex != -1 &&
+      subOpearandIndex != -1 &&
+      addOpearandIndex < subOpearandIndex
+    ) {
+      if (charactersToProcess[addOpearandIndex] == "+") {
+        firstOperandIndex = addOpearandIndex - 1;
+        secondOperandIndex = addOpearandIndex + 1;
+        result =
+          parseFloat(charactersToProcess[firstOperandIndex]) +
+          parseFloat(charactersToProcess[secondOperandIndex]);
+
+        charactersToProcess.splice(firstOperandIndex, 3, result);
+      }
+    } else if (
+      addOpearandIndex != -1 &&
+      subOpearandIndex != -1 &&
+      subOpearandIndex < addOpearandIndex
+    ) {
+      if (charactersToProcess[subOpearandIndex] == "-") {
+        firstOperandIndex = subOpearandIndex - 1;
+        secondOperandIndex = subOpearandIndex + 1;
+        result =
+          parseFloat(charactersToProcess[firstOperandIndex]) -
+          parseFloat(charactersToProcess[secondOperandIndex]);
+
+        charactersToProcess.splice(firstOperandIndex, 3, result);
+      }
+    } else {
+      if (addOpearandIndex !== -1) {
+        firstOperandIndex = addOpearandIndex - 1;
+        secondOperandIndex = addOpearandIndex + 1;
+        result =
+          parseFloat(charactersToProcess[firstOperandIndex]) +
+          parseFloat(charactersToProcess[secondOperandIndex]);
+
+        charactersToProcess.splice(firstOperandIndex, 3, result);
+      } else if (subOpearandIndex !== -1) {
+        firstOperandIndex = subOpearandIndex - 1;
+        secondOperandIndex = subOpearandIndex + 1;
+        result =
+          parseFloat(charactersToProcess[firstOperandIndex]) -
+          parseFloat(charactersToProcess[secondOperandIndex]);
+
+        charactersToProcess.splice(firstOperandIndex, 3, result);
+      }
+    }
+  }
+  return charactersToProcess[0];
+  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice
+}