(adsbygoogle = window.adsbygoogle || []).push({}); Please Help!! Mathematica ignoring variable domains

I had to calculate an integral, which involves real as well complex parts. As mathematica takes all variables to be complex by default I used the elements function to define that certain variables were Reals.

But it doesn't change the answer. It is still giving a long answer with the same conditions as if the variables were complex.

I am attaching a PDF file if anyone wants to have a look. Am i doing something wrong??

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# Please Help Mathematica ignoring variable domains

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