Respostas

2014-04-27T18:42:45-03:00
-7^2 |+| (+3)×(-4)-(-5)
-7^2 |+| +3×-4+5
-7^2 |+| 3x+1
-7^2 |+| 3
-7×-7 |+| 3
+49+3=+52