Б 11) \(\frac{a-7}{a^2}-\frac{15+2a}{a^2}\)

\(\frac{a-7}{a^2}-\frac{15+2a}{a^2}=\frac{a-7-15-2a}{a^2}=-\frac{a+22}{a^2}\).

Ответ: \(-\frac{a+22}{a^2}\)