Respuestas

2012-09-04T02:20:20+02:00
1) 3 (4-4-(8+5)-5) =-54   2)   -3 (-6-8)-8+5 = 39    
2012-09-04T02:21:24+02:00

 3(4+(-4)-(8+5))-5= 

3(4-4-13)-5
3(-13)-5
-10-5
=-15

 (-3(-6-8)-)8+5=
(-3(-14)-)13
-3-14-13
=-30