2 4 + t ------------------- 2 / 2\ | / 2\ | | | t | | | |-2 + --| | | \ 2 / | t*|4 + ----------| | 2 | \ t /
2 4 + t ------------------- 2 / 2\ | / 2\ | | \-4 + t / | t*|4 + ----------| | 2 | \ 4*t /
(4.0 + t^2)/(t*(4.0 + 0.25*(-4.0 + t^2)^2/t^2)^2)
3 / 2\ 16*t *\4 + t / --------------------- 2 / 2 \ |/ 2\ 2| \\-4 + t / + 16*t /
2 4 + t ----------------------- 2 / 2 \ | / 2 \ 1 | t*|4 + \t - 4/ *----| | 2| \ 4*t /