C part of the question... Expert only and no no no links


$\mathbf{15}\mathbf{.} Evaluate c) {\left(\frac{81}{16}\right)}^{\frac{-3}{4}} X \left[{\left(\frac{25}{4}\right)}^{\frac{-3}{2}} ÷ {\left(\frac{5}{3}\right)}^{-3}\right]$