Respuestas

2013-10-23T18:06:01+02:00
2013-10-23T18:51:51+02:00
-6-((-5+(-7)-(12)))-(-3))= -6+3-(-5+(-7)-(12))=-3+5-(-7)-(12)= 2+7-12 = -3
Tu resultado es. -3