12 4 6 2 x 4 July 8, 2019 16 32 64 128 4 5 x 12 4 6 2 4 1 5x )+ 6 2 12 x )+ 4x 4x 12 x 2 * 2x 4 2x 6 4 x 12 x 6 4 2 9 6 2 3 x 4 )+ 4 5x 12 8 6 x 4 12 2 4x 10 4 (- x 12 )=- 2 4x 6