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