12+2=
16-15=
14-3=
19-1=
16-14=
3+10=
3+12=
9+9=
14+2=
17-9=
7+11=
6+14=
14-4=
19+1=
16-1=
16+1=
15-13=
4+11=
12-9=
14-8=
15-7=
7+10=
18+1=
14-1=
16-9=
20-17=
20-9=
6+13=
16-5=
16-2=
18-7=
11+4=
14-12=
6+5=
13-7=
17-12=
14-6=
19-16=
19-6=
12-3=
13-10=
16+2=
10+1=
6+10=
0+16=
3+14=
20-5=
19-18=
11+7=
17-12=