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