5 (a+b)(a-b)-(a+b)2 (2-это степень скобки) Помогите)

4a^2-4b^2+2ab )))))))))))

4a^2-4b^2+2ab              !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!