this problem is in the improper integrals section but i just need help taking the integral. the bounds are from 0 to positive infinity.
xarctanx/(1+x^2)^2
i tried doing a trig sub x = tan θ, which gives θtanθ/(secθ)^2 I believe, which gives θsinθ/(cosθ)^3. I couldn't find anything to help...