Respostas

2014-03-27T10:13:20-03:00
{-8-7-[-5.(-4)=(5-8.(-3)]} 
{ -8-7-[ 20= ( 5- 24)]}
{-8-7-[20= -19]}
{ -8-7-[20+19]}
{-8-7 - 39}
 {-15-39}
 -54
1 5 1