Please help, I am not sure if you can read my latex code. A friend of mine sent this to me before her final exam, I have been trying to solve it for 3-4 days. I used some substitutions, I tried integration by parts but couldn't get a solution. I used wolfram alpha but it needs more time and for that I have to be premium. I couldn't get this solved on Matlab.(adsbygoogle = window.adsbygoogle || []).push({});

##\int_{0}^{\infty}\frac{x}{x^2+1}\tan{x}\cos{((\tan(x))^2)}dx##

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# Hard Integral Question

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