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