6b 5c 9 )- 4 2b c 1 July 8, 2019 16 32 64 128 5) 2c - (9 - 5 1c) 6) - 5c + (13 - 6c) 2 4(8a-9b)-4 1(5b+6c)-1 9(-4a+7c)
