The integral 1/(x^4+2x^2cosh(2a)+1)

German version: https://youtu.be/XcGnaRtH66o Let's get this weird integral done! :D We are going to use partial fraction decomposition, the inverse tangent and factorisation to get a nice looking primitive :3 Help me create more and better content! =) https://www.patreon.com/mathable Visit my website! =) https://mathable.me/