calculus - How to evaluate this integral $int_0^{frac{pi}{2}}(ln(tan x))^2dx$?

How to evaluate this integral ?
$$\int_0^{\frac{\pi}{2}}(\ln(\tan x))^2dx$$
I changed it to
$$\int_{-\infty}^{\infty}\frac{x^2e^x}{e^{2x}+1}dx$$

Thanks in advance.