\[\boxed{\mathbf{1071}\mathbf{.}}\]
\[1)\ 2\sin^{2}\left( \frac{\pi}{4} - a \right) + \sin{2a} = 1 -\]
\[- \cos\left( \frac{\pi}{2} - 2a \right) + \sin{2a} =\]
\[= 1 - \sin{2a} + \sin{2a} = 1\]
\[2)\ 2\cos^{2}\left( \frac{\pi}{4} - a \right) - \sin{2a} = 1 +\]
\[+ \cos\left( \frac{\pi}{2} - 2a \right) - \sin{2a} =\]
\[= 1 + \sin{2a} - \sin{2a} = 1\]