1: (9 (10 - 7)) 82: 9 (10 - 7) 83: 9 ((10 - 7) 8)4: 9 (8 (10 - 7))5: 9 8 (10 - 7)6: (9 8) (10 - 7)7: (8 (10 - 7)) 98: 8 (10 - 7) 99: 8 ((10 - 7) 9)10: 8 (9 (10 - 7))11: 8 9 (10 - 7)12: (8 9) (10 - 7)