2 2 6 x 3 9 July 8, 2019 16 32 64 128 2 2x 2 3 6 )= x 9 X 2 6 x 3 )- 6x 2 9 3 2 x 2 2 6 x 9 5 (- 1 8 2 x 2 6 9 3