/ 2\
| -1 + 2*x |
2*|-2 + ---------|
| 2 |
\ x /
------------------
x / 2\
2*\-1 + 2*x /
-4 + -------------
2
x
------------------
x 2
-2 + 4*x
-4 + ---------
2
x
--------------
x 2.0*(-2.0 + (-1.0 + 2.0*x^2)/x^2)/x
/ 2\
2*\-1 + 2*x /
-4 + -------------
2
x
------------------
x