/-4 + x\ lim |------| x->4+| 2 | \ x /
Limit((-4 + x)/x^2, x, 4)
0
= 2.66448782304536e-32
/-4 + x\ lim |------| x->4-| 2 | \ x /
= 5.81104037864982e-35
2.66448782304536e-32