Question

{(-3)^3}^-1 ×(-7)^-3

Answer 1

hope this answer helps you

Answer 2

Friend, here's your answer!!!
${ { - 3}^{3} }^{ - 1} \times { - 7}^{ - 3} \\ = { - 27}^{ - 1} \times ( \frac{ - 1}{343} ) \\ = ( \frac{ - 1}{27} ) \times ( \frac{ - 1}{343} ) \\ = \frac{1}{27 \times 343} \\ = \frac{1}{9261}$