Integration of Tan^(-1) dx from d/dx xTan^(-1)(x)

https://dl.pushbulletusercontent.com/x05WrDxGr2xKcaXiQ9BJP3x0jGlWRM5U/IMG_20150813_011839.jpg

part i: Tan^(-1)(x) + x/1+x^2

Not too sure about part ii.

Thanks in advance!