$832.58 - 242.31 = 779.84 - ?$

If $5 \sqrt{5} \times 5^{3} \div 5^{-\frac{3}{2}} = 5^{a+2},$ then the value of $a$ is

$3 \div \left[ (8 - 5) \div \left\{ (4 - 2) \div \left( 2 + \frac{8}{13} \right) \right\} \right] = ?$

If $p=99,$ then the value of $p(p^{2}+3p+3)$ is

If $p=9$ and $q=\sqrt{17}$,then the value of $(p^{2}-q^{2})^{\frac{-1}{3}}$ is equal to

What approximate value will come in place of the question mark $(?)$ in the given equation? (You are not expected to calculate the exact value)
$24.98^{2} \times \frac{16.02^{2}}{(7.98 \times 15.04)} \times 38.93 = 130 \times ?^{2}$