11 - 3 + 6 = 8 + 6 = 14
13 - (3 + 4) = 13 - 7 = 6
18 - 10 - 5 = 8 - 5 = 3
11 + (9 - 7) = 11 + 2 = 13
17 - (3 + 6) = 17 - 9 = 8
(18 - 9) + 5 = 9 + 5 = 13
11 - 3 + 6 = 8 + 6 = 14
13 - (3 + 4) = 13 - 7 = 6
18 - 10 - 5 = 8 - 5 = 3
11 + (9 - 7) = 11 + 2 = 13
17 - (3 + 6) = 17 - 9 = 8
(18 - 9) + 5 = 9 + 5 = 13