/ 7 \ lim |-------| x->-9+| 2| \81 - x /
Limit(7/(81 - x^2), x, -9)
oo
= 58.7438351122562
/ 7 \ lim |-------| x->-9-| 2| \81 - x /
-oo
= -58.7006252298639
58.7438351122562