__________
/ 2
3*\/ 2 + 7*x 7*x*atan(3*x)
--------------- + -------------
2 __________
1 + 9*x / 2
\/ 2 + 7*x
$$\frac{7 x \operatorname{atan}{\left(3 x \right)}}{\sqrt{7 x^{2} + 2}} + \frac{3 \sqrt{7 x^{2} + 2}}{9 x^{2} + 1}$$
/ 2 \
| 7*x |
__________ 7*|-1 + --------|*atan(3*x)
/ 2 | 2|
54*x*\/ 2 + 7*x \ 2 + 7*x / 42*x
- ------------------ - --------------------------- + ------------------------
2 __________ __________
/ 2\ / 2 / 2\ / 2
\1 + 9*x / \/ 2 + 7*x \1 + 9*x /*\/ 2 + 7*x
$$- \frac{54 x \sqrt{7 x^{2} + 2}}{\left(9 x^{2} + 1\right)^{2}} + \frac{42 x}{\sqrt{7 x^{2} + 2} \left(9 x^{2} + 1\right)} - \frac{7 \left(\frac{7 x^{2}}{7 x^{2} + 2} - 1\right) \operatorname{atan}{\left(3 x \right)}}{\sqrt{7 x^{2} + 2}}$$
/ / 2 \ __________ / 2 \ / 2 \ \
| | 7*x | / 2 | 36*x | | 7*x | |
| 21*|-1 + --------| 18*\/ 2 + 7*x *|-1 + --------| 49*x*|-1 + --------|*atan(3*x)|
| 2 | 2| | 2| | 2| |
| 378*x \ 2 + 7*x / \ 1 + 9*x / \ 2 + 7*x / |
3*|- ------------------------- - ------------------------ + -------------------------------- + ------------------------------|
| 2 __________ __________ 2 3/2 |
| / 2\ / 2 / 2\ / 2 / 2\ / 2\ |
\ \1 + 9*x / *\/ 2 + 7*x \1 + 9*x /*\/ 2 + 7*x \1 + 9*x / \2 + 7*x / /
$$3 \left(- \frac{378 x^{2}}{\sqrt{7 x^{2} + 2} \left(9 x^{2} + 1\right)^{2}} + \frac{49 x \left(\frac{7 x^{2}}{7 x^{2} + 2} - 1\right) \operatorname{atan}{\left(3 x \right)}}{\left(7 x^{2} + 2\right)^{\frac{3}{2}}} + \frac{18 \sqrt{7 x^{2} + 2} \left(\frac{36 x^{2}}{9 x^{2} + 1} - 1\right)}{\left(9 x^{2} + 1\right)^{2}} - \frac{21 \left(\frac{7 x^{2}}{7 x^{2} + 2} - 1\right)}{\sqrt{7 x^{2} + 2} \left(9 x^{2} + 1\right)}\right)$$
/ / 2 \ __________ / 2 \ / 2 \ \
| | 7*x | / 2 | 36*x | | 7*x | |
| 21*|-1 + --------| 18*\/ 2 + 7*x *|-1 + --------| 49*x*|-1 + --------|*atan(3*x)|
| 2 | 2| | 2| | 2| |
| 378*x \ 2 + 7*x / \ 1 + 9*x / \ 2 + 7*x / |
3*|- ------------------------- - ------------------------ + -------------------------------- + ------------------------------|
| 2 __________ __________ 2 3/2 |
| / 2\ / 2 / 2\ / 2 / 2\ / 2\ |
\ \1 + 9*x / *\/ 2 + 7*x \1 + 9*x /*\/ 2 + 7*x \1 + 9*x / \2 + 7*x / /
$$3 \left(- \frac{378 x^{2}}{\sqrt{7 x^{2} + 2} \left(9 x^{2} + 1\right)^{2}} + \frac{49 x \left(\frac{7 x^{2}}{7 x^{2} + 2} - 1\right) \operatorname{atan}{\left(3 x \right)}}{\left(7 x^{2} + 2\right)^{\frac{3}{2}}} + \frac{18 \sqrt{7 x^{2} + 2} \left(\frac{36 x^{2}}{9 x^{2} + 1} - 1\right)}{\left(9 x^{2} + 1\right)^{2}} - \frac{21 \left(\frac{7 x^{2}}{7 x^{2} + 2} - 1\right)}{\sqrt{7 x^{2} + 2} \left(9 x^{2} + 1\right)}\right)$$