Okay before i pose this problem, there are quite a number of people who see my question as "not well- posed...." Well on the contrary this question is pretty straightforward and does not require much to say(But still stuck on).

this is an indefinite integral problem:

The problem i have here is that i failed to recognize the proper substitution for the function. So i completely ignored substitution and just used integration by parts, and i get a whacky answer, rather messy actually. Im very sure there is a substitution for this, can anyone spot it?? Of course after the substitution the computation is easy.

i would appreciate any help.