Combine the numerators over the common denominator.

Apply the distributive property.

Multiply by .

Multiply by .

Subtract from .

Subtract from .

Factor out of .

Factor out of .

Factor out of .

Factor out of .

Rewrite as .

Since both terms are perfect squares, factor using the difference of squares formula, where and .

Subtract (4a+1)/(a^2-4)-(2a+7)/(a^2-4)