Respostas

2014-02-04T16:41:01-02:00
25 + {-3 +[-1 -3]}
25 + {-3 +[-4]}
25 + {-3 -4}
25 + {-7}
25 -7
18
1 1 1
2014-02-04T16:41:24-02:00
25+{-3+[-1-3+]}
25+{-3+[-4+]}
25+{-3-4+}
25+{-7+}
25-7=18

1 1 1