diff --git a/lesson_06/expression/.env.test b/lesson_06/expression/.env.test
index 56cf4a06f..6f05a4e86 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=F
diff --git a/lesson_06/expression/src/expression_calculator.ts b/lesson_06/expression/src/expression_calculator.ts
index 76b215c42..d4c0dd88e 100644
--- a/lesson_06/expression/src/expression_calculator.ts
+++ b/lesson_06/expression/src/expression_calculator.ts
@@ -1,11 +1,33 @@
 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;
+    // Implements: a * Math.pow(b + c, d) / e using class methods
+    const sum = this.add(b, c); // b + c
+    const power = this.pow(sum, d); // (b + c)^d
+    const product = this.multiply(a, power); // a * (b + c)^d
+    return this.divide(product, e); // (a * (b + c)^d) / e
   }
 
   pow(base: number, exponent: number): number {
     return Math.pow(base, exponent);
   }
+
+  add(a: number, b: number): number {
+    return a + b;
+  }
+
+  subtract(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("Division by zero is not allowed.");
+    }
+    return a / b;
+  }
 }