What is ${\left( 9^{5} \right)^{-2}}$

${9^{ -10 }}$ ${\frac{1}{81}^{ -10 }}$ ${9^{ \frac{1}{25} }}$ ${\frac{1}{81}^{ \frac{1}{25} }}$ ${9^{ 3 }}$ ${\frac{1}{81}^{ 3 }}$