1 x
------ - -----------
2 ________
1 + x / 2
\/ 1 + x
$$- \frac{x}{\sqrt{x^{2} + 1}} + \frac{1}{x^{2} + 1}$$
2
1 x 2*x
- ----------- + ----------- - ---------
________ 3/2 2
/ 2 / 2\ / 2\
\/ 1 + x \1 + x / \1 + x /
$$\frac{x^{2}}{\left(x^{2} + 1\right)^{\frac{3}{2}}} - \frac{2 x}{\left(x^{2} + 1\right)^{2}} - \frac{1}{\sqrt{x^{2} + 1}}$$
3 2
2 3*x 3*x 8*x
- --------- - ----------- + ----------- + ---------
2 5/2 3/2 3
/ 2\ / 2\ / 2\ / 2\
\1 + x / \1 + x / \1 + x / \1 + x /
$$\frac{8 x^{2}}{\left(x^{2} + 1\right)^{3}} - \frac{3 x^{3}}{\left(x^{2} + 1\right)^{\frac{5}{2}}} + \frac{3 x}{\left(x^{2} + 1\right)^{\frac{3}{2}}} - \frac{2}{\left(x^{2} + 1\right)^{2}}$$