Integral with arctan and e: $\int_{0}^{\infty}\frac{\arctan(x^{3})}{e^{2\pi x}-1}\,\mathrm dx$
Solution 1:
you can seehttp://www.artofproblemsolving.com/Forum/viewtopic.php?f=67&t=493626
you can seehttp://www.artofproblemsolving.com/Forum/viewtopic.php?f=67&t=493626