2 7 8 9 x 2 3 July 8, 2019 16 32 64 128 8 7 2 35 x 2 9 9 3x 7 2 8 2 x 5 3x 2 2 7 x 9 3 6 5 x 8 2 2 7 x 9 3 6 3 x 8 2 (- 9 7 + 2 8) / 2 3
