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