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 /
$$\frac{256 x^{3} \left(\frac{96 x^{4}}{- 16 x^{4} + 1} + 5\right)}{\left(- 16 x^{4} + 1\right)^{\frac{3}{2}}}$$