Respostas

2014-03-19T10:27:54-03:00
-8+[4-(7-13) -1]+5
-8+{4+6-1}+5
-8+9+5
1+5
=+6
2014-03-19T10:29:22-03:00
-8+[4-(-6) -1] +5
-8+[4+6-1] +5
-8+[9]+5
-8-9+5
-1+5
4
1 1 1