/ 3\
| -4 + x |
6*|-1 + -------|
| 3 |
\ x /
----------------
x / 3\
6*\-4 + x /
-6 + -----------
3
x
----------------
x 3
-24 + 6*x
-6 + ----------
3
x
---------------
x 6.0*(-1.0 + (-4.0 + x^3)/x^3)/x
/ 3\
6*\-4 + x /
-6 + -----------
3
x
----------------
x