1
-----------
________
/ 2
\/ 1 + x
$$\frac{1}{\sqrt{x^{2} + 1}}$$
-x
-----------
3/2
/ 2\
\1 + x /
$$- \frac{x}{\left(x^{2} + 1\right)^{\frac{3}{2}}}$$
2
3*x
-1 + ------
2
1 + x
-----------
3/2
/ 2\
\1 + x /
$$\frac{\frac{3 x^{2}}{x^{2} + 1} - 1}{\left(x^{2} + 1\right)^{\frac{3}{2}}}$$