/ 2 \
| 100*x 3 15*x |
125*|-1 + --------- + ------------------------ + -----------------------|
| 2 / 2\ 2 / 2\ |
\ 1 + 25*x 8*\1 + 25*x /*atan (5*x) 2*\1 + 25*x /*atan(5*x)/
-------------------------------------------------------------------------
2
/ 2\ ___________
\1 + 25*x / *\/ atan(5*x)
$$\frac{125 \left(\frac{100 x^{2}}{25 x^{2} + 1} + \frac{15 x}{2 \left(25 x^{2} + 1\right) \operatorname{atan}{\left(5 x \right)}} - 1 + \frac{3}{8 \left(25 x^{2} + 1\right) \operatorname{atan}^{2}{\left(5 x \right)}}\right)}{\left(25 x^{2} + 1\right)^{2} \sqrt{\operatorname{atan}{\left(5 x \right)}}}$$