/ 2\ | 3 21*x | lim |x - 29*x - -----| x->3+\ 4 /
Limit(x^3 - 29*x - 21*x^2/4, x, 3)
-429/4
= -107.25
/ 2\ | 3 21*x | lim |x - 29*x - -----| x->3-\ 4 /
-107.25