y = -x-3
3^x= -1/9
7*6
5 diveded into 72
y= 2x-6
860026811960053555066867245429158434857775136 x 2
400/0.25
y= -3x-2
3*3-3/3+3
( 2 x al cubo - 3 x + x elevado a 5 ) con ( x + 1/2 )