/ 2 \ | x | lim |------| x->0+| 2| \1 + x /
Limit(x^2/(1 + x^2), x, 0)
0
= 1.05054553350518e-31
/ 2 \ | x | lim |------| x->0-| 2| \1 + x /
1.05054553350518e-31