8
--------------
2
1 + (8*x + 2)
$$\frac{8}{\left(8 x + 2\right)^{2} + 1}$$
-256*(1 + 4*x)
-------------------
2
/ 2\
\1 + 4*(1 + 4*x) /
$$- \frac{1024 x + 256}{\left(4 \left(4 x + 1\right)^{2} + 1\right)^{2}}$$
/ 2 \
| 16*(1 + 4*x) |
1024*|-1 + ----------------|
| 2|
\ 1 + 4*(1 + 4*x) /
----------------------------
2
/ 2\
\1 + 4*(1 + 4*x) /
$$\frac{\frac{16384 \left(4 x + 1\right)^{2}}{4 \left(4 x + 1\right)^{2} + 1} - 1024}{\left(4 \left(4 x + 1\right)^{2} + 1\right)^{2}}$$