-3
-------------
__________
/ 2
\/ 1 - 9*x
$$- \frac{3}{\sqrt{- 9 x^{2} + 1}}$$
-27*x
-------------
3/2
/ 2\
\1 - 9*x /
$$- \frac{27 x}{\left(- 9 x^{2} + 1\right)^{\frac{3}{2}}}$$
/ 2 \
| 27*x |
-27*|1 + --------|
| 2|
\ 1 - 9*x /
------------------
3/2
/ 2\
\1 - 9*x /
$$- \frac{\frac{729 x^{2}}{- 9 x^{2} + 1} + 27}{\left(- 9 x^{2} + 1\right)^{\frac{3}{2}}}$$