\[\boxed{\text{5.162.}}\]
\[\textbf{а)}\ 485\ 979 + 691 \cdot 308 =\]
\[= 698\ 807\ \]
\[\textbf{б)}\ 409 \cdot 539 - 179\ 888 =\]
\[= 40\ 563\ \]
\[\textbf{в)}\ 15^{3} - 3^{3} \cdot 5 =\]
\[= 225 \cdot 15 - 27 \cdot 5 = 3\ 240\ \]
\[\textbf{г)}\ \left( 10^{3} - 6^{3} \right)\ :\left( 2^{4} \cdot 7^{2} \right) =\]
\[= (1\ 000 - 216)\ :(16 \cdot 49) =\]
\[= 784\ :784 = 1\]