2*atanh(x)
----------
2
1 - x
$$\frac{2 \operatorname{atanh}{\left (x \right )}}{- x^{2} + 1}$$
2*(1 + 2*x*atanh(x))
--------------------
2
/ 2\
\-1 + x /
$$\frac{1}{\left(x^{2} - 1\right)^{2}} \left(4 x \operatorname{atanh}{\left (x \right )} + 2\right)$$
/ 2 \
| 3*x 4*x *atanh(x) |
4*|- ------- - ------------- + atanh(x)|
| 2 2 |
\ -1 + x -1 + x /
----------------------------------------
2
/ 2\
\-1 + x /
$$\frac{1}{\left(x^{2} - 1\right)^{2}} \left(- \frac{16 x^{2} \operatorname{atanh}{\left (x \right )}}{x^{2} - 1} - \frac{12 x}{x^{2} - 1} + 4 \operatorname{atanh}{\left (x \right )}\right)$$