5x 12 4 x 3 July 8, 2019 16 32 64 128 5x 12 x 2 4 x 1 3 0 5x 12 y 9 x 3y 4 15 3x 2 5x 12 x 4 3 2x 4 5x 12 x 4 5 x 12 12 x 5