\[\boxed{\mathbf{1553}\mathbf{.}}\]
\[1)\ y = \sin{2x} \bullet \cos{3x};\]
\[= \frac{5\cos(2x + 3x) - \cos(3x - 2x)}{2} =\]
\[= \frac{5\cos{5x} - \cos x}{2}.\]
\[2)\ y = x \bullet \cos{2x};\]
\[y^{'}(x) = (x)^{'} \bullet \cos{2x} + x \bullet \left( \cos{2x} \right)^{'} =\]
\[= 1 \bullet \cos{2x} + x \bullet \left( - 2\sin{2x} \right) =\]
\[= \cos{2x} - 2x \bullet \sin{2x}.\]