\[\boxed{\mathbf{87}.}\]
\[1)\ b \cdot 72 + c\]
\[b = 4;\ \ c = 112:\]
\[4 \cdot 72 + 112 = 288 + 112 =\]
\[= 400.\]
\[2)\ 2a^{3} - 586\]
\[a = 10:\]
\[2 \cdot 10^{3} - 586 = 2000 - 586 =\]
\[= 1414.\]