7+6
13
5-4
1
20+60
80
100-80
20
11+9
9-5
4
40+100
140
30-15
15
9+8
17
6-3
3
90+20
110
50-20
30
3+18
21
10-3
7
80+10
90
80-50
30+90
120
11-5
6
70+40
100-90
10
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