\[\boxed{\text{673\ (673).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ a^{3}b^{6} = (ab^{2})³\]
\[2)\ 8x^{3}y^{9} = (2xy^{3})³\]
\[3)\frac{1}{64}c^{9} = \left( \frac{1}{4}c^{3} \right)^{3}\]
\(4)\ 125m^{12}n^{21} = \left( 5m^{4}n^{7} \right)^{3}\)
\[5)\ 0,216k^{15}p^{24} = (0,6k^{5}p^{8})³\]
\[6)\ 0,008a^{9}b^{18}c^{27} =\]
\[= (0,2a^{3}b^{6}c^{9})³\]