/ d d \
7*|(-3 + re(x))*--(re(x)) + --(im(x))*im(x)|
\ dx dx /
--------------------------------------------
|x - 3|
$$\frac{1}{\left|{x - 3}\right|} \left(7 \left(\Re{x} - 3\right) \frac{d}{d x} \Re{x} + 7 \Im{x} \frac{d}{d x} \Im{x}\right)$$
/ 2\
| / d d \ |
| 2 2 2 2 |(-3 + re(x))*--(re(x)) + --(im(x))*im(x)| |
|/d \ /d \ d d \ dx dx / |
7*||--(im(x))| + |--(re(x))| + (-3 + re(x))*---(re(x)) + ---(im(x))*im(x) - -------------------------------------------|
|\dx / \dx / 2 2 2 |
\ dx dx |-3 + x| /
--------------------------------------------------------------------------------------------------------------------------
|-3 + x|
$$\frac{1}{\left|{x - 3}\right|} \left(- \frac{7}{\left|{x - 3}\right|^{2}} \left(\left(\Re{x} - 3\right) \frac{d}{d x} \Re{x} + \Im{x} \frac{d}{d x} \Im{x}\right)^{2} + 7 \left(\Re{x} - 3\right) \frac{d^{2}}{d x^{2}} \Re{x} + 7 \Im{x} \frac{d^{2}}{d x^{2}} \Im{x} + 7 \frac{d}{d x} \Re{x}^{2} + 7 \frac{d}{d x} \Im{x}^{2}\right)$$
/ / 2 2 2 2 \\
| 3 / d d \ |/d \ /d \ d d ||
| / d d \ 3*|(-3 + re(x))*--(re(x)) + --(im(x))*im(x)|*||--(im(x))| + |--(re(x))| + (-3 + re(x))*---(re(x)) + ---(im(x))*im(x)||
| 3 3 3*|(-3 + 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 /|
7*|(-3 + 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 |-3 + x| dx dx |-3 + x| /
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|-3 + x|
$$\frac{1}{\left|{x - 3}\right|} \left(\frac{21}{\left|{x - 3}\right|^{4}} \left(\left(\Re{x} - 3\right) \frac{d}{d x} \Re{x} + \Im{x} \frac{d}{d x} \Im{x}\right)^{3} - \frac{21}{\left|{x - 3}\right|^{2}} \left(\left(\Re{x} - 3\right) \frac{d}{d x} \Re{x} + \Im{x} \frac{d}{d x} \Im{x}\right) \left(\left(\Re{x} - 3\right) \frac{d^{2}}{d x^{2}} \Re{x} + \Im{x} \frac{d^{2}}{d x^{2}} \Im{x} + \frac{d}{d x} \Re{x}^{2} + \frac{d}{d x} \Im{x}^{2}\right) + 7 \left(\Re{x} - 3\right) \frac{d^{3}}{d x^{3}} \Re{x} + 7 \Im{x} \frac{d^{3}}{d x^{3}} \Im{x} + 21 \frac{d}{d x} \Re{x} \frac{d^{2}}{d x^{2}} \Re{x} + 21 \frac{d}{d x} \Im{x} \frac{d^{2}}{d x^{2}} \Im{x}\right)$$