[(a + 2 / 1b) squared - (A-2 / 1b) squared] (2a-2 / 1b) (2 / 1b + 2a) multiplied by (4 / 1b squared + 4A squared), where a = - 1, B = 2

[(a + 2 / 1b) squared - (A-2 / 1b) squared] (2a-2 / 1b) (2 / 1b + 2a) multiplied by (4 / 1b squared + 4A squared), where a = - 1, B = 2

The original formula = (a + 2 / 1b + A-2 / 1b) (a + 2 / 1b-a + 2 / 1b) (4a & sup2; - 4 / 1b & sup2;)
=2ab(4a²-4/1b²)
=8a³b-2/1ab³
=-16+4
=-12