72 - 8 × 6 = 72 - 48 = 24
(3 + 4) × 9 = 7 × 9 = 63
15 + 7 × 5 = 15 + 35 = 50
48 : 8 × 9 = 6 × 9 = 54
7 × (15 - 7) = 7 × 8 = 56
3 × 8 : 4 = 24 : 4 = 6