Respostas

2014-03-25T10:38:58-03:00
40+{50-[35-(25-5)-]}+7
40+{50-[35-20-]}+7
40+{50-15-}+7
40+35-7
68
2014-03-25T10:44:31-03:00
40+{50-[35-(25-5)-]}+7=
40+{50-[35-(20)-]}+7
40+{50-[15]}+7
40+35-7
75-7
68



reposta final:68
1 5 1