This is LaTeX code:
[latex]
=\frac{\sqrt{2}}{8}\left(\ln{\frac{t^2+\sqrt{2}t+1}{t^2-\sqrt{2}t+1}}+2\arctan{\left(\sqrt{2}t-1\right)}+2\arctan{\left(\sqrt{2}t+1\right)}\right)+C
[/latex]