/ 56*cos(7*x) 128*x*sin(7*x)\
70*|- ----------- + 49*atan(4*x)*sin(7*x) + --------------|
| 2 2 |
| 1 + 16*x / 2\ |
\ \1 + 16*x / /
$$70 \left(\frac{128 x \sin{\left(7 x \right)}}{\left(16 x^{2} + 1\right)^{2}} + 49 \sin{\left(7 x \right)} \operatorname{atan}{\left(4 x \right)} - \frac{56 \cos{\left(7 x \right)}}{16 x^{2} + 1}\right)$$
/ / 2 \ \
| | 64*x | |
| 128*|-1 + ---------|*sin(7*x) |
| | 2| |
| 588*sin(7*x) \ 1 + 16*x / 2688*x*cos(7*x)|
70*|343*atan(4*x)*cos(7*x) + ------------ - ----------------------------- + ---------------|
| 2 2 2 |
| 1 + 16*x / 2\ / 2\ |
\ \1 + 16*x / \1 + 16*x / /
$$70 \left(\frac{2688 x \cos{\left(7 x \right)}}{\left(16 x^{2} + 1\right)^{2}} + 343 \cos{\left(7 x \right)} \operatorname{atan}{\left(4 x \right)} + \frac{588 \sin{\left(7 x \right)}}{16 x^{2} + 1} - \frac{128 \left(\frac{64 x^{2}}{16 x^{2} + 1} - 1\right) \sin{\left(7 x \right)}}{\left(16 x^{2} + 1\right)^{2}}\right)$$