atan(2*x) 2
- --------- + ------------
2 / 2\
x x*\1 + 4*x /
$$\frac{2}{x \left(4 x^{2} + 1\right)} - \frac{1}{x^{2}} \operatorname{atan}{\left (2 x \right )}$$
/ 8 atan(2*x) 2 \
2*|- ----------- + --------- - -------------|
| 2 3 2 / 2\|
| / 2\ x x *\1 + 4*x /|
\ \1 + 4*x / /
$$2 \left(- \frac{8}{\left(4 x^{2} + 1\right)^{2}} - \frac{2}{x^{2} \left(4 x^{2} + 1\right)} + \frac{1}{x^{3}} \operatorname{atan}{\left (2 x \right )}\right)$$
/ 3*atan(2*x) 6 16 128*x \
2*|- ----------- + ------------- + ------------- + -----------|
| 4 3 / 2\ 2 3|
| x x *\1 + 4*x / / 2\ / 2\ |
\ x*\1 + 4*x / \1 + 4*x / /
$$2 \left(\frac{128 x}{\left(4 x^{2} + 1\right)^{3}} + \frac{16}{x \left(4 x^{2} + 1\right)^{2}} + \frac{6}{x^{3} \left(4 x^{2} + 1\right)} - \frac{3}{x^{4}} \operatorname{atan}{\left (2 x \right )}\right)$$