-8*x
--------------
___________
/ 4
\/ 1 - 16*x
$$- \frac{8 x}{\sqrt{- 16 x^{4} + 1}}$$
/ 4 \
| 32*x |
-8*|1 + ---------|
| 4|
\ 1 - 16*x /
------------------
___________
/ 4
\/ 1 - 16*x
$$- \frac{\frac{256 x^{4}}{- 16 x^{4} + 1} + 8}{\sqrt{- 16 x^{4} + 1}}$$
/ 4 \
3 | 96*x |
-256*x *|5 + ---------|
| 4|
\ 1 - 16*x /
-----------------------
3/2
/ 4\
\1 - 16*x /
$$- \frac{256 x^{3} \left(\frac{96 x^{4}}{- 16 x^{4} + 1} + 5\right)}{\left(- 16 x^{4} + 1\right)^{\frac{3}{2}}}$$