Evaluate $\bigg(\dfrac{81}{16}\bigg)^{\displaystyle -\dfrac{3}{4}}$ $\times$ $\bigg[\bigg(\dfrac{25}{9}\bigg)^{\displaystyle -\dfrac{3}{2}} \div \bigg(\dfrac{5}{2}\bigg)^{\displaystyle -3}\bigg]$

$\bigg(\dfrac{81}{16}\bigg)^{\displaystyle -\dfrac{3}{4}}$ $\times$ $\Bigg[\bigg(\dfrac{25}{9}\bigg)^{\displaystyle -\dfrac{3}{2}} \div \bigg(\dfrac{5}{2}\bigg)^{\displaystyle -3}\Bigg]$

D

$=\,\,\,$ $\bigg(\dfrac{81}{16}\bigg)^{\displaystyle (-1) \times \dfrac{3}{4}}$ $\times$ $\Bigg[\bigg(\dfrac{25}{9}\bigg)^{\displaystyle (-1) \times \dfrac{3}{2}} \div \bigg(\dfrac{5}{2}\bigg)^{\displaystyle (-1) \times 3}\Bigg]$

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