3 7m 4 2m 7 6m 2 9m July 8, 2019 16 32 64 128 - (5 7m - 6 7) - (7 9 - 3 6m) 3 6m = - 7 2 4m = 3 3/7 6) (3m - 7n) ^ 2 - 9m(m - 5n)