/ 1 \
2*|1 - -------------------------|
| / 1 \ 2|
| |1 + ---------|*(-4 + x) |
| | 2| |
\ \ (-4 + x) / /
---------------------------------
/ 1 \ 3
|1 + ---------|*(-4 + x)
| 2|
\ (-4 + x) /
$$\frac{2 - \frac{2}{\left(1 + \frac{1}{\left(x - 4\right)^{2}}\right) \left(x - 4\right)^{2}}}{\left(1 + \frac{1}{\left(x - 4\right)^{2}}\right) \left(x - 4\right)^{3}}$$
/ 4 7 \
2*|-3 - -------------------------- + -------------------------|
| 2 / 1 \ 2|
| / 1 \ 4 |1 + ---------|*(-4 + x) |
| |1 + ---------| *(-4 + x) | 2| |
| | 2| \ (-4 + x) / |
\ \ (-4 + x) / /
---------------------------------------------------------------
/ 1 \ 4
|1 + ---------|*(-4 + x)
| 2|
\ (-4 + x) /
$$\frac{1}{\left(1 + \frac{1}{\left(x - 4\right)^{2}}\right) \left(x - 4\right)^{4}} \left(-6 + \frac{14}{\left(1 + \frac{1}{\left(x - 4\right)^{2}}\right) \left(x - 4\right)^{2}} - \frac{8}{\left(1 + \frac{1}{\left(x - 4\right)^{2}}\right)^{2} \left(x - 4\right)^{4}}\right)$$