1 4x 1 2x 3 7 July 8, 2019 16 32 64 128 1 2x 1 4x 1 7x 3 x 4x 1 3 2x 1 2 3x 7 5 6 4x 1 2 3 2x 8x 1 7 1 7 4x 5 1 7 2x 3 2 7x 1 2x 3 4x 1 (- 1 2x 7 10 3 4x 1 5 1 4/7 x 2 1) 4x + 1 7
