1
------------
2
1 + (x + 5)
$$\frac{1}{\left(x + 5\right)^{2} + 1}$$
-2*(5 + x)
---------------
2
/ 2\
\1 + (5 + x) /
$$- \frac{2 \left(x + 5\right)}{\left(\left(x + 5\right)^{2} + 1\right)^{2}}$$
/ 2 \
| 4*(5 + x) |
2*|-1 + ------------|
| 2|
\ 1 + (5 + x) /
---------------------
2
/ 2\
\1 + (5 + x) /
$$\frac{2 \cdot \left(\frac{4 \left(x + 5\right)^{2}}{\left(x + 5\right)^{2} + 1} - 1\right)}{\left(\left(x + 5\right)^{2} + 1\right)^{2}}$$