diff --git a/lesson_06/expression/.env.test b/lesson_06/expression/.env.test
index 56cf4a06f..b77a3d9ed 100644
--- a/lesson_06/expression/.env.test
+++ b/lesson_06/expression/.env.test
@@ -1 +1 @@
-HW_VERSION=your assigned version here
\ No newline at end of file
+HW_VERSION=A
diff --git a/lesson_06/expression/src/expression_calculator.ts b/lesson_06/expression/src/expression_calculator.ts
index 76b215c42..5543c41d6 100644
--- a/lesson_06/expression/src/expression_calculator.ts
+++ b/lesson_06/expression/src/expression_calculator.ts
@@ -1,11 +1,26 @@
 export class ExpressionCalculator {
-  /** Returns a calculation involving a, b, c, d, and e */
-  calculate(a: number, b: number, c: number, d: number, e: number): number {
-    // Implement your code here to return the correct value.
-    return 0;
+  add(a: number, b: number): number {
+    return a + b;
+  }
+
+  multiply(a: number, b: number): number {
+    return a * b;
+  }
+
+  divide(a: number, b: number): number {
+    if (b === 0) throw new Error("Cannot divide by zero");
+    return a / b;
+  }
+
+  pow(a: number, b: number): number {
+    return Math.pow(a, b);
   }
 
-  pow(base: number, exponent: number): number {
-    return Math.pow(base, exponent);
+  calculate(a: number, b: number, c: number, d: number, e: number): number {
+    const step1 = this.add(a, b);
+    const step2 = this.multiply(step1, c);
+    const step3 = this.pow(d, e);
+    const result = this.divide(step2, step3);
+    return result;
   }
 }