2+7
9
99-99
0
4+6
10
5-2
3
16+8
24
27-89
62
5+7
12
2-9
7
20+89
109
75-48
27
10+10
20
20-10
200+300
500
350-400
50
9+9
18
5-10
5
75+26
101
111-400
289
13+2
15
15-10