Please use parentheses where required to make the problem clear....!!
I assume the expression is supposed to be
With the "x+4" in both denominators, we can essentially ignore them. (Or, if you prefer, we can multiply numerator and denominator of the original fraction by (x+4).)
We end up with
Here both the numerator and denominator factor easily; and the expression can then be simplified by canceling common factors.
That part should be easy; I'll leave it for you to finish.