diff --git a/lesson_06/benjaminscott/README.md b/lesson_06/benjaminscott/README.md
new file mode 100644
index 000000000..c12b4f1ce
--- /dev/null
+++ b/lesson_06/benjaminscott/README.md
@@ -0,0 +1,33 @@
+# Stretch Assignment
+
+```
+function isValidAlphaAbbreviation(word: string, abbr: string): boolean {
+    const letterToNum = { "a": 1, "b": 2, "c": 3, "d": 4, "e": 5, "f": 6, "g": 7, "h": 8, "i": 9, "j": 10, "k": 11, "l": 12, "m": 13, "n": 14, "o": 15, "p": 16, "q": 17, "r": 18, "s": 19, "t": 20, "u": 21, "v": 22, "w": 23, "x": 24, "y": 25, "z": 26 };
+    let wordIndex = 0;
+    let abbrIndex = 0;
+
+    while (abbrIndex < abbr.length && wordIndex < word.length) {
+        if (abbr[abbrIndex] === word[wordIndex]) {
+            wordIndex++;
+
+        } else {
+            const currentAbbrChar = abbr[abbrIndex];
+
+            if (currentAbbrChar < 'a' || currentAbbrChar > 'z') {
+                return false;
+            }
+
+            const targetNumber = letterToNum[currentAbbrChar];
+
+            wordIndex += targetNumber;
+        }
+
+        abbrIndex++;
+    }
+
+    if (abbrIndex === abbr.length && wordIndex === word.length) {
+        return true;
+    }
+    return false;
+}
+```
diff --git a/lesson_06/expression/.env.test b/lesson_06/expression/.env.test
index 56cf4a06f..8532774b0 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
\ No newline at end of file
diff --git a/lesson_06/expression/src/expression_calculator.ts b/lesson_06/expression/src/expression_calculator.ts
index 76b215c42..7241f8104 100644
--- a/lesson_06/expression/src/expression_calculator.ts
+++ b/lesson_06/expression/src/expression_calculator.ts
@@ -2,10 +2,26 @@ 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;
+    return this.divide(this.multiply(this.add(a, b), c), this.pow(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 {
+    return a / b;
+  }
 }