4 15 x 3 14 x 2 13 July 8, 2019 16 32 64 128 4 16 x 3 15 x 2 14 x 1 13 4/15 x 3 14 / 15 = 3 / x 15 x 14 4 x - 13 x + 29 x - 14 x
