12-89 9+515 18-916-8 15-84
11-99 11-85 12-99+6 17-85
13-58 7+412 13-712-6 18-410
1+2=
3+2=
2+2=
10-57 9+1020 10-46
2+810 9+515 18-88
7+9=
17-13=
2+4=
8+6=
9+0=
16-3=
9+8-6=
4+5+6=
17-4-3=