9+1= 7-5= 5+4= 9-6= 8-6 + 2=
10-5= 6+2= 5-1= 4+3= 10 -7+4=
8-8= 0+9= 6-5= 4+5= 8-5 +7 =
6+4= 8-6= 9-3= 7-6= 2 + 7- 6=
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