\[\boxed{\text{536\ (536).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\textbf{а)}\ 6^{n + 3}\ :6^{n} = 6^{n + 3 - n} = 6^{3} =\]
\[= 216\]
\[\textbf{б)}\ 10^{n + 1}\ :10^{n - 1} =\]
\[= 10^{n + 1 - (n - 1)} = 10^{n + 1 - n + 1} =\]
\[= 10^{2} = 100\ \]