1. ## Please Need an help on this itegral!!

Hi everyone!!
I have to integrate the following function.

Here a,b,c and d are constants. I have to integrate the above function with respect to x in the region from zero to infinity. This may seem like a Beta integral function, but there is a slight change that there are three terms x, (1-x) and (1-x^b).

Also I have found in a journal article that the answer for the integral is given as below

But the evaluation methods are not given. They might used a series expansion, but nothing is given there.