2x9
8-7
8+7
8x2
6+4
17-2
18-7
13-5
13+5
7x2
18-3
7+5
14-1
3x3
11-8
12+3
11-4
12-9
4x3
9+2
13-6
2x6
7-4
9-4
5+3
3x4
5-1
4+2
4+7