Respostas

2014-05-25T12:30:24-03:00
- (4-9+5) - (-3+5)  

- 4 + 9 - 5 + 3 - 5 
 
5 - 5 + 3 - 5 

 0 + 3 - 5 

-2 
1 5 1
2014-05-25T12:32:19-03:00
- (4-9+5) - (-3+5) 
(4-9+5) - (2)
- 0 - 2
-2