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