10+7
17
10-2
8
13+8
21
45-83
22
92-45
47
17+9
26
11+2
13
11+8
19
22+45
67
99-83
16
2+1
3
8+3
11
11+7
18
67-55
12
108-105
0+0
=0
8+8
18+5
23
83-45
38
75+80
155