2
2*x + 6*x + 8
-------------- + (6 + 4*x)*atan(x)
2
1 + x
$$\left(4 x + 6\right) \operatorname{atan}{\left(x \right)} + \frac{\left(2 x^{2} + 6 x\right) + 8}{x^{2} + 1}$$
/ / 2 \ \
|3 + 2*x x*\4 + x + 3*x/ |
4*|------- - ---------------- + atan(x)|
| 2 2 |
| 1 + x / 2\ |
\ \1 + x / /
$$4 \left(- \frac{x \left(x^{2} + 3 x + 4\right)}{\left(x^{2} + 1\right)^{2}} + \frac{2 x + 3}{x^{2} + 1} + \operatorname{atan}{\left(x \right)}\right)$$
/ / 2 \ \
| | 4*x | / 2 \ |
| |-1 + ------|*\4 + x + 3*x/ |
| | 2| |
| \ 1 + x / 3*x*(3 + 2*x)|
4*|3 + ---------------------------- - -------------|
| 2 2 |
\ 1 + x 1 + x /
----------------------------------------------------
2
1 + x
$$\frac{4 \left(- \frac{3 x \left(2 x + 3\right)}{x^{2} + 1} + 3 + \frac{\left(\frac{4 x^{2}}{x^{2} + 1} - 1\right) \left(x^{2} + 3 x + 4\right)}{x^{2} + 1}\right)}{x^{2} + 1}$$