/ 2 3\ lim \x - 2*x / x->0+
Limit(x^2 - 2*x^3, x, 0)
0
= -1.14146603948081e-30
/ 2 3\ lim \x - 2*x / x->0-
= 9.47804879490632e-31
-1.14146603948081e-30