Выполните действия (7x+7y)/a^4*(6a^8)/(x^2-y^2).

\[\frac{7x + 7y}{a^{4}} \cdot \frac{6a^{8}}{x^{2} - y^{2}} = \frac{7(x + y) \cdot 6a^{8}}{a^{4}(x - y)(x + y)} =\]

\[= \frac{42a^{4}}{x - y}\]