/ 4 \ | x | lim |-------| x->1+| 3| \-1 + x /
Limit(x^4/(-1 + x^3), x, 1)
oo
= 51.3392248663537
/ 4 \ | x | lim |-------| x->1-| 3| \-1 + x /
-oo
= -49.33921512005
51.3392248663537