/ 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