Respostas

2014-05-09T15:03:08-03:00
7.(-3) + 3.(-3)-4.(-3+1)
-21-9+16
-14
2014-05-09T15:04:41-03:00
7(-3)+3(-3)-4(-3+1)
7(-3)+3(-3)-4(-2)
-21-9+8
-21-1
-22