50-20
6+6+2
10+5+8
10+10
24+24
28+3
96-7
54-5
5+7+9
20-5-6
14+3
52-9
20-8-4
5+2+8
85-5-2
48
20
21
49
15
31
78
43
8
89
17
30
14
23
9
