4+4
8
10-2
25+11
36
50-5
45
2+8
10
5-3
2
16+23
39
22-1
21
7+6
13
17-7
39+7
46
46-4
42
8+7
15
20-7
22+24
38-15
23
12+5
17
18-6
12
33+17
50
42-25