1+4
5
10+4
14
4-2
2
9-9
0
4+3
7
6+4
10
2-2
7-3
4
5+5
7+8
15
6-5
1
8-2
6
2+6
8
8+9
17
10-3
9+2
11
12+13
25
9-7
9-4
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