13-95 16-87 >91
17-810 15-69 <80
5549 16-711 17-816-8
1221 10+320 19-818-9
8+8=
8+6=
15-9=
13-8=
15-10=
19-8=
14+3=
8+9=
3+8=
18-9=
4+7=
13-9=
16-7=
10+8=
5+8=