8-4
4
10-6
4
9+10
19
6+7
13
8+6
14
8-7
1
2+3
5
4-2
2
9+2
11
8-2
6
9-3
6
4+7
11
8+3
11
5-4
1
10-5
5
7+8
15
5+4
9
9+5
14
6-4
2
6-4
2
7+4
11
10-2
8
8+5
13
5-1
4