§ Задание 1306
\[\boxed{\mathbf{1306}\mathbf{.}}\]

\[= - 2\sin\alpha \bullet \cos\alpha \bullet 2\sin{2\beta} \bullet \cos{2\beta} =\]
\[= - \sin{2\alpha} \bullet \sin{4\beta}.\]

\[= - \cos{2\alpha} \bullet \cos{4\beta}.\]
\[\boxed{\mathbf{1306}\mathbf{.}}\]

\[= - 2\sin\alpha \bullet \cos\alpha \bullet 2\sin{2\beta} \bullet \cos{2\beta} =\]
\[= - \sin{2\alpha} \bullet \sin{4\beta}.\]

\[= - \cos{2\alpha} \bullet \cos{4\beta}.\]