\[\boxed{\text{1212.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]
\[\textbf{а)}\ 0,0001x^{- 4} = {0,1}^{4} \cdot x^{- 4} =\]
\[= 10^{- 4} \cdot x^{- 4} = (10x)^{- 4}\]
\[\textbf{б)}\ 32y^{- 5} = 2^{5}y^{- 5} =\]
\[= 2^{5} \cdot \frac{1}{y^{5}} = \left( \frac{2}{y} \right)^{5}\]
\[\textbf{в)}\ 0,0081a^{8}b^{- 12} =\]
\[= {0,3}^{4}\left( a^{2} \right)^{4}\left( b^{- 3} \right)^{4} =\]
\[= \left( 0,3a^{2}b^{- 3} \right)^{4} = \left( \frac{0,3a^{2}}{b^{3}} \right)^{4}\]
\[\textbf{г)}\ 10^{n}x^{- 2n}y^{3n} =\]
\[= 10^{n}\left( x^{- 2} \right)^{n}\left( y^{3} \right)^{n} =\]
\[= \left( 10x^{- 2}y^{3} \right)^{n}\]