1
-----------
3/2
/ 2\
\1 + x /
$$\frac{1}{\left(x^{2} + 1\right)^{\frac{3}{2}}}$$
-3*x
-----------
5/2
/ 2\
\1 + x /
$$- \frac{3 x}{\left(x^{2} + 1\right)^{\frac{5}{2}}}$$
/ 2 \
| 5*x |
3*|-1 + ------|
| 2|
\ 1 + x /
---------------
5/2
/ 2\
\1 + x /
$$\frac{\frac{15 x^{2}}{x^{2} + 1} - 3}{\left(x^{2} + 1\right)^{\frac{5}{2}}}$$