A & sup3; - 3A & sup2; B + 3AB & sup2; - B calculation a=-2 b=2

A & sup3; - 3A & sup2; B + 3AB & sup2; - B calculation a=-2 b=2

Wrong, the last is B & sup3;
The original formula = (A & sup3; - B & sup3;) - 3AB (a-b)
=(a-b)(a²+ab+b²)-3ab(a-b)
=(a-b)(a²-2ab+b²)
=(a-b)³
=(-2-2)³
=-64