d d d d
(1 + re(x))*--(re(x)) + --(im(x))*im(x) (-1 + re(x))*--(re(x)) + --(im(x))*im(x)
dx dx dx dx
--------------------------------------- + ----------------------------------------
|x + 1| |x - 1|
$$\frac{1}{\left|{x - 1}\right|} \left(\left(\Re{x} - 1\right) \frac{d}{d x} \Re{x} + \Im{x} \frac{d}{d x} \Im{x}\right) + \frac{1}{\left|{x + 1}\right|} \left(\left(\Re{x} + 1\right) \frac{d}{d x} \Re{x} + \Im{x} \frac{d}{d x} \Im{x}\right)$$
2 2 2 2 2 2 2 2
/d \ /d \ d d /d \ /d \ d d 2 2
|--(im(x))| + |--(re(x))| + (1 + re(x))*---(re(x)) + ---(im(x))*im(x) |--(im(x))| + |--(re(x))| + (-1 + re(x))*---(re(x)) + ---(im(x))*im(x) / d d \ / d d \
\dx / \dx / 2 2 \dx / \dx / 2 2 |(1 + re(x))*--(re(x)) + --(im(x))*im(x)| |(-1 + re(x))*--(re(x)) + --(im(x))*im(x)|
dx dx dx dx \ dx dx / \ dx dx /
----------------------------------------------------------------------- + ------------------------------------------------------------------------ - ------------------------------------------ - -------------------------------------------
|1 + x| |-1 + x| 3 3
|1 + x| |-1 + x|
$$- \frac{1}{\left|{x - 1}\right|^{3}} \left(\left(\Re{x} - 1\right) \frac{d}{d x} \Re{x} + \Im{x} \frac{d}{d x} \Im{x}\right)^{2} - \frac{1}{\left|{x + 1}\right|^{3}} \left(\left(\Re{x} + 1\right) \frac{d}{d x} \Re{x} + \Im{x} \frac{d}{d x} \Im{x}\right)^{2} + \frac{1}{\left|{x - 1}\right|} \left(\left(\Re{x} - 1\right) \frac{d^{2}}{d x^{2}} \Re{x} + \Im{x} \frac{d^{2}}{d x^{2}} \Im{x} + \frac{d}{d x} \Re{x}^{2} + \frac{d}{d x} \Im{x}^{2}\right) + \frac{1}{\left|{x + 1}\right|} \left(\left(\Re{x} + 1\right) \frac{d^{2}}{d x^{2}} \Re{x} + \Im{x} \frac{d^{2}}{d x^{2}} \Im{x} + \frac{d}{d x} \Re{x}^{2} + \frac{d}{d x} \Im{x}^{2}\right)$$
3 3 2 2 3 3 2 2 / 2 2 2 2 \ / 2 2 2 2 \
d d d d d d d d d d d d 3 3 / d d \ |/d \ /d \ d d | / d d \ |/d \ /d \ d d |
(1 + re(x))*---(re(x)) + ---(im(x))*im(x) + 3*--(im(x))*---(im(x)) + 3*--(re(x))*---(re(x)) (-1 + re(x))*---(re(x)) + ---(im(x))*im(x) + 3*--(im(x))*---(im(x)) + 3*--(re(x))*---(re(x)) / d d \ / d d \ 3*|(1 + re(x))*--(re(x)) + --(im(x))*im(x)|*||--(im(x))| + |--(re(x))| + (1 + re(x))*---(re(x)) + ---(im(x))*im(x)| 3*|(-1 + re(x))*--(re(x)) + --(im(x))*im(x)|*||--(im(x))| + |--(re(x))| + (-1 + re(x))*---(re(x)) + ---(im(x))*im(x)|
3 3 dx 2 dx 2 3 3 dx 2 dx 2 3*|(1 + re(x))*--(re(x)) + --(im(x))*im(x)| 3*|(-1 + re(x))*--(re(x)) + --(im(x))*im(x)| \ dx dx / |\dx / \dx / 2 2 | \ dx dx / |\dx / \dx / 2 2 |
dx dx dx dx dx dx dx dx \ dx dx / \ dx dx / \ dx dx / \ dx dx /
------------------------------------------------------------------------------------------- + -------------------------------------------------------------------------------------------- + -------------------------------------------- + --------------------------------------------- - --------------------------------------------------------------------------------------------------------------------- - -----------------------------------------------------------------------------------------------------------------------
|1 + x| |-1 + x| 5 5 3 3
|1 + x| |-1 + x| |1 + x| |-1 + x|
$$\frac{3}{\left|{x - 1}\right|^{5}} \left(\left(\Re{x} - 1\right) \frac{d}{d x} \Re{x} + \Im{x} \frac{d}{d x} \Im{x}\right)^{3} - \frac{3}{\left|{x - 1}\right|^{3}} \left(\left(\Re{x} - 1\right) \frac{d}{d x} \Re{x} + \Im{x} \frac{d}{d x} \Im{x}\right) \left(\left(\Re{x} - 1\right) \frac{d^{2}}{d x^{2}} \Re{x} + \Im{x} \frac{d^{2}}{d x^{2}} \Im{x} + \frac{d}{d x} \Re{x}^{2} + \frac{d}{d x} \Im{x}^{2}\right) + \frac{3}{\left|{x + 1}\right|^{5}} \left(\left(\Re{x} + 1\right) \frac{d}{d x} \Re{x} + \Im{x} \frac{d}{d x} \Im{x}\right)^{3} - \frac{3}{\left|{x + 1}\right|^{3}} \left(\left(\Re{x} + 1\right) \frac{d}{d x} \Re{x} + \Im{x} \frac{d}{d x} \Im{x}\right) \left(\left(\Re{x} + 1\right) \frac{d^{2}}{d x^{2}} \Re{x} + \Im{x} \frac{d^{2}}{d x^{2}} \Im{x} + \frac{d}{d x} \Re{x}^{2} + \frac{d}{d x} \Im{x}^{2}\right) + \frac{1}{\left|{x - 1}\right|} \left(\left(\Re{x} - 1\right) \frac{d^{3}}{d x^{3}} \Re{x} + \Im{x} \frac{d^{3}}{d x^{3}} \Im{x} + 3 \frac{d}{d x} \Re{x} \frac{d^{2}}{d x^{2}} \Re{x} + 3 \frac{d}{d x} \Im{x} \frac{d^{2}}{d x^{2}} \Im{x}\right) + \frac{1}{\left|{x + 1}\right|} \left(\left(\Re{x} + 1\right) \frac{d^{3}}{d x^{3}} \Re{x} + \Im{x} \frac{d^{3}}{d x^{3}} \Im{x} + 3 \frac{d}{d x} \Re{x} \frac{d^{2}}{d x^{2}} \Re{x} + 3 \frac{d}{d x} \Im{x} \frac{d^{2}}{d x^{2}} \Im{x}\right)$$