7 + 18 = 18 +7 = 25 3+ (40 - 23) = (3 +40) - 23 = 43-23 = 20 (6 +46) - 20 = 6 + (46 - 20) = 6 + 26 = 32 7 + (90 - 65) = (7 + 90) - 65 = 97 - 65 = 32 (3 + 79) - 30 = 3+ (79 - 30) = 3 + 49 = 52
25;20;32;33;32;52;.......