diff --git a/lesson_06/expression/src/expression_calculator.ts b/lesson_06/expression/src/expression_calculator.ts
index 13cb2ca05..6491252fa 100644
--- a/lesson_06/expression/src/expression_calculator.ts
+++ b/lesson_06/expression/src/expression_calculator.ts
@@ -2,7 +2,25 @@ export class ExpressionCalculator {
   /** Returns the calculation of ((a + b) * c) / d^e */
   calculate(a: number, b: number, c: number, d: number, e: number): number {
     // Implement your code here to return the correct value.
-    return 0;
+    const sum = this.add(a, b);
+    const pro = this.multiply(sum, c);
+    const expo = this.pow(d, e);
+    const quo = this.divide(pro, expo);
+
+    return quo;
+  }
+
+  add(a: number, b: number): number {
+    const result = a + b;
+    return result;
+  }
+  multiply(a: number, b: number): number {
+    const prod = a * b;
+    return prod;
+  }
+  divide(a: number, b: number): number {
+    const quot = a / b;
+    return quot;
   }
 
   pow(base: number, exponent: number): number {