7*x
--------- + atan(7*x)
2 2
1 + 49*x 18*x *atan(7*x)
--------------------- + ---------------
2 2
2 - 9*x / 2\
\2 - 9*x /
$$\frac{18 x^{2} \operatorname{atan}{\left(7 x \right)}}{\left(2 - 9 x^{2}\right)^{2}} + \frac{\frac{7 x}{49 x^{2} + 1} + \operatorname{atan}{\left(7 x \right)}}{2 - 9 x^{2}}$$
/ / 2 \ / 2 \ \
| | 49*x | / 7*x \ | 36*x | |
|7*|-1 + ---------| 18*x*|--------- + atan(7*x)| 9*x*|-1 + ---------|*atan(7*x)|
| | 2| | 2 | | 2| |
| \ 1 + 49*x / \1 + 49*x / \ -2 + 9*x / |
2*|------------------ + ---------------------------- - ------------------------------|
| 2 2 2 |
\ 1 + 49*x -2 + 9*x -2 + 9*x /
--------------------------------------------------------------------------------------
2
-2 + 9*x
$$\frac{2 \left(\frac{18 x \left(\frac{7 x}{49 x^{2} + 1} + \operatorname{atan}{\left(7 x \right)}\right)}{9 x^{2} - 2} - \frac{9 x \left(\frac{36 x^{2}}{9 x^{2} - 2} - 1\right) \operatorname{atan}{\left(7 x \right)}}{9 x^{2} - 2} + \frac{7 \left(\frac{49 x^{2}}{49 x^{2} + 1} - 1\right)}{49 x^{2} + 1}\right)}{9 x^{2} - 2}$$
/ / 2 \ / 2 \ / 2 \ / 2 \ \
| | 49*x | | 36*x | / 7*x \ | 49*x | 2 | 18*x | |
| 1372*x*|-1 + ---------| 27*|-1 + ---------|*|--------- + atan(7*x)| 378*x*|-1 + ---------| 972*x *|-1 + ---------|*atan(7*x)|
| | 2| | 2| | 2 | | 2| | 2| |
| \ 1 + 49*x / \ -2 + 9*x / \1 + 49*x / \ 1 + 49*x / \ -2 + 9*x / |
2*|- ----------------------- - ------------------------------------------- - ----------------------- + ---------------------------------|
| 2 2 / 2\ / 2\ 2 |
| / 2\ -2 + 9*x \1 + 49*x /*\-2 + 9*x / / 2\ |
\ \1 + 49*x / \-2 + 9*x / /
-----------------------------------------------------------------------------------------------------------------------------------------
2
-2 + 9*x
$$\frac{2 \left(\frac{972 x^{2} \left(\frac{18 x^{2}}{9 x^{2} - 2} - 1\right) \operatorname{atan}{\left(7 x \right)}}{\left(9 x^{2} - 2\right)^{2}} - \frac{1372 x \left(\frac{49 x^{2}}{49 x^{2} + 1} - 1\right)}{\left(49 x^{2} + 1\right)^{2}} - \frac{378 x \left(\frac{49 x^{2}}{49 x^{2} + 1} - 1\right)}{\left(9 x^{2} - 2\right) \left(49 x^{2} + 1\right)} - \frac{27 \left(\frac{7 x}{49 x^{2} + 1} + \operatorname{atan}{\left(7 x \right)}\right) \left(\frac{36 x^{2}}{9 x^{2} - 2} - 1\right)}{9 x^{2} - 2}\right)}{9 x^{2} - 2}$$