You didn't put in any parentheses and so therefore according to 
the PEMDAS rules what you typed means this:



But I don't believe you meant that.  It would be good if you 
learn to type algebraic expressions using the PEMDAS rules:
I am guessing that you meant this:



Factor whatever will factor:





Cancel the  on top into one of those on the bottom:



Cancel the  in the top into the  on the bottom,
leaving just  on the bottom



All that's left is



and we can write  simpler as 



Edwin