This integral ?(cos^2(x)*cot(x))dx is not calculating right, I have tried two other websites and they do give me like I did in my notebook, but in this website its throwing log(sin(x)) + (cos^2(x))/2 instead of log(sin(x)) - (sin^2(x))/2, can you please look into it and tell me what is happening, I'm relying a lot on this website and have bought the Pro version, I have also tried giving any value for "x" on both answers and they have different results, thanks!