\[7^{- 2} = \frac{1}{7^{2}} = \frac{1}{49};\text{\ \ \ \ }\]
\[( - 2)^{- 5} = \frac{1}{( - 2)^{5}} = \frac{1}{- 32};\]
\[\left( \frac{1}{9} \right)^{- 1} = 9;\text{\ \ \ }\]
\[(0,85)^{0} = 1.\]