5+2
7
3+5
8
4+2
6
6+3
9
8-4
4
5-3
2
5-5
0
8+2
10
6-3
3
5+3-7
1
6-3
3
8-4
4
10-3
7
6 +3 -1
8
5-1
4
8+1
9
