\[\boxed{\text{5.363.}}\]
\[\textbf{а)}\ (936\ :24 + \ 32 \cdot 14)\ :487 =\]
\[= (39 + 448)\ :487 =\]
\[= 487\ :487 = 1\ \]
\[\textbf{б)}\ (43 \cdot 56 + 43 \cdot 44)\ :215 - \ 15 =\]
\[= \left( 43 \cdot (56 + 44) \right)\ :215 - 15 =\]
\[= (43 \cdot 100)\ :215 - 15 =\]
\[= 4\ 300\ :215 - 15 = 20 - 15 =\]
\[= 5\ \]