7+18 = 18+7 = 256+27 = 27+6 = 333+(40-23) = 3+17 = 207+(90-65) = 7+25 = 32(6+46)-20 = 52-20 = 32(3+79)-30 = 82-30 = 52
7+18 = 18+7 = 25
6+27 = 27+6 = 33
3+(40-23) = 3+17 = 20
7+(90-65) = 7+25 = 32
(6+46)-20 = 52-20 = 32
(3+79)-30 = 82-30 = 52