/ 2\ atan(5*x)*\1 + x /
atan(5*x)*(1 + x^2)
/ 2\ 5*\1 + x / 2*x*atan(5*x) + ---------- 2 1 + 25*x
/ / 2\ \ | 10*x 125*x*\1 + x / | 2*|--------- - -------------- + atan(5*x)| | 2 2 | |1 + 25*x / 2\ | \ \1 + 25*x / /
/ / 2 \\ | / 2\ | 100*x || | 25*\1 + x /*|-1 + ---------|| | 2 | 2|| | 150*x \ 1 + 25*x /| 10*|3 - --------- + ----------------------------| | 2 2 | \ 1 + 25*x 1 + 25*x / ------------------------------------------------- 2 1 + 25*x