/ x \ lim |3 - ----------------| x->3+\ (-3 + x)*(3 + x)/
Limit(3 - x/((-3 + x)*(3 + x)), x, 3)
/ x \ lim |3 - ----------------| x->3+\ (-3 + x)*(3 + x)/
-oo
= -72.5832414553473
/ x \ lim |3 - ----------------| x->3-\ (-3 + x)*(3 + x)/
oo
= 78.4165745856354
= 78.4165745856354