Correction :

14 - 0 = 14	36 - 13 = 23
28 - 16 = 12	5 - 0 = 5
7 - 2 = 5	13 + 13 = 26
17 - 15 = 2	21 - 14 = 7
35 : 5 = 7	24 - 3 = 21
24 - 11 = 13	22 - 3 = 19
34 - 22 = 12	5 + 13 = 18
21 - 0 = 21	7 + 4 = 11
23 - 18 = 5	14 + 11 = 25
20 + 8 = 28	11 + 2 = 13