Retrying exponent merge because I kept the wrong changes last time

calculator.py

@@ -1,16 +1,30 @@
-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)
+def add(a, b):
+    return a + b
+
+def subtract(a, b):
+    return a - b
+
+def multiply(a, b):
+    return a * b
+
+def divide(a, b):
+    if b == 0:
+        raise ZeroDivisionError("Cannot divide by zero.")
+    return a / b
+
+def square(a):
+    return a * a
+
+def cube(a):
+    return a * a * a
+
+def square_n_times(a, n):
+    return square(a) * n
+
+print("I'm going use the calculator functions to divide 5 by 6")
+x = divide(5,6)
+print(x)
+
+print("I'm going use the calculator functions to square 5 three times and sum the results")
+x = square_n_times(5,3)
 print(x)