1:(10 - 7) × 5 + 92:((10 - 7) × 5) + 93:9 + (10 - 7) × 54:9 + ((10 - 7) × 5)5:9 - (7 - 10) × 56:9 - ((7 - 10) × 5)7:9 + (5 × (10 - 7))8:9 + 5 ×(10 - 7)9:9 - (5 × (7 - 10))10...