-4*x / 27*x 12*log(6) 2 \
2*6 *|- ----------- - --------- + 8*log (6)*atan(3*x)|
| 2 2 |
| / 2\ 1 + 9*x |
\ \1 + 9*x / /
$$2 \cdot 6^{- 4 x} \left(- \frac{27 x}{\left(9 x^{2} + 1\right)^{2}} + 8 \log{\left(6 \right)}^{2} \operatorname{atan}{\left(3 x \right)} - \frac{12 \log{\left(6 \right)}}{9 x^{2} + 1}\right)$$
/ / 2 \ \
| | 36*x | |
| 27*|-1 + --------| |
| | 2| 2 |
-4*x | 3 \ 1 + 9*x / 72*log (6) 324*x*log(6)|
2*6 *|- 32*log (6)*atan(3*x) + ------------------ + ---------- + ------------|
| 2 2 2 |
| / 2\ 1 + 9*x / 2\ |
\ \1 + 9*x / \1 + 9*x / /
$$2 \cdot 6^{- 4 x} \left(\frac{324 x \log{\left(6 \right)}}{\left(9 x^{2} + 1\right)^{2}} - 32 \log{\left(6 \right)}^{3} \operatorname{atan}{\left(3 x \right)} + \frac{72 \log{\left(6 \right)}^{2}}{9 x^{2} + 1} + \frac{27 \left(\frac{36 x^{2}}{9 x^{2} + 1} - 1\right)}{\left(9 x^{2} + 1\right)^{2}}\right)$$