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