 simple, tan x, correct? So I think it is u times minus integral of 2i, so 2i will secant integration, yes, so ln secant x plus tan x, and since this is 2i, you can say i is half of this, just in some degree here, keep on piling up, okay? So this is sin theta plus becomes pretty straight line, plus x, so can I say plus c, this is going to be a final answer, so differentiation you can do, yes sir, which is nothing but x minus tan inverse x minus 1, okay? So instead of integrating this fellow, instead of integrating this fellow with respect to x, you can choose to integrate this with respect to x, yes sir, which is easy to do, this is x, so practice you should be working, this becomes x tan inverse x minus half ln 1 plus x squared minus, now the same thing you have to repeat for this, just replacing x with x minus 1, so the answer would be x minus 1 times tan inverse x minus 1 minus half ln mod 1 plus x minus 1 times terms and take things that can be done, okay, so let's discuss this, now I take this now, which is what we need, converted this to new takes where I am going to do two takes squared plus two takes squared, so basically this is nothing but tan inverse of two takes squared plus two takes, let's call it as theta, okay, so basically you are integrating tan inverse x is 8 times two times theta into sequence squared theta, d theta, yes or no? So we are placing it back here, it will become theta and theta is linked to sequence squared theta, can I say this term would be pretty easy to integrate? Yes, why tan theta into sequence squared theta would be easy, integration of this which just not is a minus derivative one integration, so far so good, this is my, this entire, this is a derivative.