5m 8n 9 2m 3n 4 July 8, 2019 16 32 64 128 (3m + 5n) + (9m - 7n) - (-2n + 5m) - (5n + m) + (- 4n + 8m) - (2m - 5n) (3m – 4n)(5m + 8n)