1:(5 × (10 - 7)) + 9
2:5 × (10 - 7) + 9
3:9 - (5 × (7 - 10))
4:9 - 5 ×(7 - 10)
5:9 + (5 × (10 - 7))
6:9 + 5 ×(10 - 7)
7:9 - (7 - 10) × 5
8:9 - ((7 - 10) × 5)
9:9 + (10 - 7) × 5
10:9 + ((10 - 7) × 5)
11:(10 - 7) × 5 + 9
12:((10 - 7) × 5) + 9