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