Nevermind, I completely forgot that I needed to multiply the denominator by to keep the expression equal. The numerator as I simplified earlier, is 1 and there is nothing to simplify in the denominator
Inuitively, I would say it's simply . Alternatively appears to give which also does not seem correct.
The question arises from this problem:
where I constantly get 1 by stating . The correct answer, according to my text book anyway, is .