primeiro commit com exercicios de Exercism realizados até esta data

python/difference-of-squares/difference_of_squares.py

@@ -0,0 +1,16 @@
+def square_of_sum(number: int) -> int:
+    sum: int = 0
+    for integer in range(1, number + 1):
+        sum += integer
+    return sum**2
+
+
+def sum_of_squares(number: int) -> int:
+    sum: int = 0
+    for integer in range(1, number + 1):
+        sum += integer**2
+    return sum
+
+
+def difference_of_squares(number: int) -> int:
+    return square_of_sum(number) - sum_of_squares(number)