\[\boxed{\mathbf{1060}\mathbf{.}}\]
\[1)\ \frac{1 + \sin{2a}}{\left( \sin a + \cos a \right)^{2}} =\]
\[= \frac{1 + \sin{2a}}{\sin^{2}a + 2\sin a\cos a + cos^{2}a} =\]
\[= \frac{1 + \sin{2a}}{1 + \sin{2a}}\]
\[2)\ \frac{\left( \cos{0,75\beta} - \sin{0,75\beta} \right)^{2}}{1 - \sin{1,5\beta}} =\]