4
35*atan (7*x)
-------------
2
1 + 49*x
$$\frac{35 \operatorname{atan}^{4}{\left(7 x \right)}}{49 x^{2} + 1}$$
3
490*atan (7*x)*(2 - 7*x*atan(7*x))
----------------------------------
2
/ 2\
\1 + 49*x /
$$\frac{490 \left(- 7 x \operatorname{atan}{\left(7 x \right)} + 2\right) \operatorname{atan}^{3}{\left(7 x \right)}}{\left(49 x^{2} + 1\right)^{2}}$$
/ 2 2 \
2 | 2 6 84*x*atan(7*x) 196*x *atan (7*x)|
3430*atan (7*x)*|- atan (7*x) + --------- - -------------- + -----------------|
| 2 2 2 |
\ 1 + 49*x 1 + 49*x 1 + 49*x /
-------------------------------------------------------------------------------
2
/ 2\
\1 + 49*x /
$$\frac{3430 \cdot \left(\frac{196 x^{2} \operatorname{atan}^{2}{\left(7 x \right)}}{49 x^{2} + 1} - \frac{84 x \operatorname{atan}{\left(7 x \right)}}{49 x^{2} + 1} - \operatorname{atan}^{2}{\left(7 x \right)} + \frac{6}{49 x^{2} + 1}\right) \operatorname{atan}^{2}{\left(7 x \right)}}{\left(49 x^{2} + 1\right)^{2}}$$