Сократите дробь: (x^2-16y^2)/(4y-x).

\[\frac{x^{2} - 16y^{2}}{4y - x} = \frac{(x - 4y)(x + 4y)}{- (x - 4y)} =\]

\[= - (x + 4y) = - x - 4y.\]