9x 9 4x 6 July 8, 2019 16 32 64 128 4x 9 9x 6 4x 16 4x 9 - 9x 6 4x 3 4x 9 9x 69 5 6 9x 9 4x 1 9x (- 9 6x 5x 7 4x 6xy - 4y + 6 - 9x 9x - 6 4x + 4
