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Simplify
Solution:
Consider the given equation above
The numerator has similar variables and the denominator is a quadratic equation of the difference of two squares. Let's group the numerator with similar variables as follows
Take out their common factor at each group, we have
Factor the denominator as the difference of two squares
The greatest common factor (GCF) of the numerator and denominator is (a + 2). Cross out their GCF and simplify into lowest term. Therefore, the final answer is
