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