5 6x 2 1 6x July 8, 2019 16 32 64 128 5 6x 2 x 1 6x 2 3 1 6x 5 6x 1 3 5 6x y 2 1 6x 3y 1 6x 4 5 6x 2 6x 5 15x 4 20x 3 15x 2 6x 1 5 6x 1 6x 2 3x 1 2y 1 3y