Respostas

2014-02-23T22:25:54-03:00
28+{13-[6-(4+1)]+2-1}
28+{13-[6-5]+2-1}
28+{13-1+2-1}
28+13
41

2014-02-23T22:28:04-03:00
28+{13-[6-(4+1)]+2-1}
28+{13-[6-5]+2-1}
28+{13-1+2-1}
28+13
41
E 53-{20-[30-(15-1+16)+2]}
53-{20-[30-(15-1+16)+2]}
53-{20-[30-30+2]}
53-{20-2}
53-18
35