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