4b 2 3b 5 July 8, 2019 16 32 64 128 4b 3b 2 3b 5 3b 3 4b 2 5b 3c 2 4b 3b 2 2b 5b 2 4b 2 (3b−6)−b 2 (5−2b) simplified 5a 4b 2 2 (- 3b 4 3a 4b 2 7a 3b 5