Respuestas

2013-06-19T21:22:14+02:00
7.[2+3.(5)-4]+2.(-4)-87[2+15-4]-8-8
7[13]-16
91-16
75





2013-06-19T21:27:43+02:00
7 x [2+3x(5)-4]+2x(-4)-8           7x2+15-4+2x(-4)=   14+15-4+(-8)= 14+15-4-8= 17