2
/ d d \
2 2 2 2 |(4 + re(x))*--(re(x)) + --(im(x))*im(x)|
/d \ /d \ d d \ dx dx /
|--(im(x))| + |--(re(x))| + (4 + re(x))*---(re(x)) + ---(im(x))*im(x) - ------------------------------------------
\dx / \dx / 2 2 2
dx dx |4 + x|
--------------------------------------------------------------------------------------------------------------------
|4 + x|
$$\frac{1}{\left|{x + 4}\right|} \left(- \frac{1}{\left|{x + 4}\right|^{2}} \left(\left(\Re{x} + 4\right) \frac{d}{d x} \Re{x} + \Im{x} \frac{d}{d x} \Im{x}\right)^{2} + \left(\Re{x} + 4\right) \frac{d^{2}}{d x^{2}} \Re{x} + \Im{x} \frac{d^{2}}{d x^{2}} \Im{x} + \frac{d}{d x} \Re{x}^{2} + \frac{d}{d x} \Im{x}^{2}\right)$$
/ 2 2 2 2 \
3 / d d \ |/d \ /d \ d d |
/ d d \ 3*|(4 + re(x))*--(re(x)) + --(im(x))*im(x)|*||--(im(x))| + |--(re(x))| + (4 + re(x))*---(re(x)) + ---(im(x))*im(x)|
3 3 3*|(4 + re(x))*--(re(x)) + --(im(x))*im(x)| 2 2 \ dx dx / |\dx / \dx / 2 2 |
d d \ dx dx / d d d d \ dx dx /
(4 + re(x))*---(re(x)) + ---(im(x))*im(x) + -------------------------------------------- + 3*--(im(x))*---(im(x)) + 3*--(re(x))*---(re(x)) - ---------------------------------------------------------------------------------------------------------------------
3 3 4 dx 2 dx 2 2
dx dx |4 + x| dx dx |4 + x|
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|4 + x|
$$\frac{1}{\left|{x + 4}\right|} \left(\frac{3}{\left|{x + 4}\right|^{4}} \left(\left(\Re{x} + 4\right) \frac{d}{d x} \Re{x} + \Im{x} \frac{d}{d x} \Im{x}\right)^{3} - \frac{3}{\left|{x + 4}\right|^{2}} \left(\left(\Re{x} + 4\right) \frac{d}{d x} \Re{x} + \Im{x} \frac{d}{d x} \Im{x}\right) \left(\left(\Re{x} + 4\right) \frac{d^{2}}{d x^{2}} \Re{x} + \Im{x} \frac{d^{2}}{d x^{2}} \Im{x} + \frac{d}{d x} \Re{x}^{2} + \frac{d}{d x} \Im{x}^{2}\right) + \left(\Re{x} + 4\right) \frac{d^{3}}{d x^{3}} \Re{x} + \Im{x} \frac{d^{3}}{d x^{3}} \Im{x} + 3 \frac{d}{d x} \Re{x} \frac{d^{2}}{d x^{2}} \Re{x} + 3 \frac{d}{d x} \Im{x} \frac{d^{2}}{d x^{2}} \Im{x}\right)$$