/ 2 \
| 3*(4 + 7*x) 4*(4 + 7*x) *atan(4 + 7*x)|
1372*|-atan(4 + 7*x) - -------------- + --------------------------|
| 2 2 |
\ 1 + (4 + 7*x) 1 + (4 + 7*x) /
-------------------------------------------------------------------
2
/ 2\
\1 + (4 + 7*x) /
$$\frac{1372 \left(\frac{4 \left(7 x + 4\right)^{2} \operatorname{atan}{\left(7 x + 4 \right)}}{\left(7 x + 4\right)^{2} + 1} - \frac{3 \left(7 x + 4\right)}{\left(7 x + 4\right)^{2} + 1} - \operatorname{atan}{\left(7 x + 4 \right)}\right)}{\left(\left(7 x + 4\right)^{2} + 1\right)^{2}}$$