9 1 7 2 5 6 July 8, 2019 16 32 64 128 7 * 9 x 2 3x 1 5 * 6 2 7 9 minus 1 5 6 1 7 of a 2 9 b 6 5 c 3 10 7 1 2m 2 1 3 9 5 6