30 + 15 - 6 = 45 - 6 = 39
60 - 7 + 18 = 53 + 18 = 71
70 : (3 + 7) + 24 = 70 : 10 + 24 = 7 + 24 = 31
60 : 6 × 3 - 18 = 10 × 3 - 18 = 30 - 18 = 12
18 : 3 + 4 × 3 = 6 + 12 = 18
2 × 8 + 21 : 7 = 16 + 3 = 19
100 - (24 - 18) × 3 = 100 - 6 × 3 = 100 - 18 = 82
100 - (72 - 67) × 2 = 100 - 5 × 2 = 100 - 10 = 90
12 + 6 : 2 - 7 × 2 = 12 + 3 - 14 = 15 - 14 = 1
37 + 9 - 6 : 2 × 3 = 37 + 9 - 3 × 3 = 37 + 9 - 9 = 46 - 9 = 37