/-64 + 3*x \ lim |----------| x->4+\-28 + 11*x/
Limit((-64 + 3*x)/(-28 + 11*x), x, 4)
-13/4
= -3.25
/-64 + 3*x \ lim |----------| x->4-\-28 + 11*x/
-3.25