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