To simplify the expression , let’s break it down step by step.

First, factor each part of the expression.

Now substituting back into the expression, we have:

Next, we can cancel common factors. Notice that in the numerator of the second fraction cancels with the denominator of the first fraction, resulting in:

Now we can also cancel and (under the condition that and ):

So, the simplified expression is:

This simplification holds true for all except when and (where the original expression is undefined).