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diff --git a/__pycache__/test_calculator.cpython-313-pytest-9.0.2.pyc b/__pycache__/test_calculator.cpython-313-pytest-9.0.2.pyc
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diff --git a/calculator.py b/calculator.py
index 24a2fef..d78a6bf 100644
--- a/calculator.py
+++ b/calculator.py
@@ -1,16 +1,38 @@
-def multiply(a,b):
-    return a * b
-
-def add(a,b):
-	return a+b
-
-def subtract(a,b):
-	return a-b
-
-def divide(a,b):
-	return a/b
-
-
-print("I'm going use the calculator functions to multiply 5 and 6")
-x = multiply(5,6)
-print(x)
\ No newline at end of file
+
+def multiply(a, b):
+    """Multiply two numbers."""
+    return a * b
+
+def add(a, b):
+    """Add two numbers."""
+    return a + b
+
+def subtract(a, b):
+    """Subtract b from a."""
+    return a - b
+
+def divide(a, b):
+    """Divide a by b."""
+    return a / b
+
+def square(a):
+    """Square a number."""
+    return a ** 2
+
+def cube(a):
+    """Cube a number."""
+    return a ** 3
+
+def square_n_times(number, n):
+    """Square the number n times and return the sum of all intermediate values."""
+    result = number
+    total = number
+    for i in range(n):
+        result = result ** 2
+        total += result
+    return total
+
+print("I'm going use the calculator functions to multiply 5 and 6")
+x = multiply(5,6)
+print(x)
+