9-7= 16-10= 13-9= 9-7=
15+2= 13-0= 5+2= 6+9=
16-5= 5-0= 10-8= 5-4=
12-4= 17+2= 17-16= 14+6=
14-5= 16-8= 11+9= 9+11=
12-4= 14+6= 10-9= 6-4=
9+10= 17-2= 16-11= 7+5=
7+3= 8+8= 6-1= 16+4=
8-7= 6-4= 9+6= 14+5=
12+1= 14-4= 15-4= 14+4=
13-2= 9-3= 9+3= 12-2=
8-2= 9+3= 16-5= 8-7=
14-10= 13-1= 8+3= 14+2=
17-0= 5-1= 10-8= 13-7=
12-1= 14+3= 16+2= 6-4=
5-3= 15-10= 9-2= 18-7=
9-0= 14+6= 14-2= 8+1=
16+3= 6+1= 11-4= 11+7=
5-3= 10-9= 7+2= 18+2=
15-10= 11-5= 15-7= 12+7=
10+9= 18+2= 17-1= 11-4=
11-2= 14+5= 8-7= 11+5=
16+3= 17+1= 16-15= 8+4=
14+2= 18-0= 5+8= 12-7=
11+8= 17-4= 6+8= 14+3=
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