Correction :

34 - 11 = 23	24 - 19 = 5
12 + 8 = 20	21 + 19 = 40
45 - 23 = 22	24 - 11 = 13
29 - 8 = 21	22 + 1 = 23
24 + 14 = 38	5 + 17 = 22
1 + 7 = 8	14 - 11 = 3
21 - 20 = 1	11 + 18 = 29
8 + 3 = 11	14 + 17 = 31
39 - 17 = 22	12 + 21 = 33
30 - 14 = 16	8 + 9 = 17