$\frac{\sqrt{1296}}{?} = \frac{?}{2.25}$

Simplify:
$\frac{3}{10} \div \frac{3}{7} \text{ of } \left(2 \frac{3}{10} + 2 \frac{3}{5}\right) + \frac{1}{5} \div 1 \frac{2}{5} - \frac{2}{7}$

If $P = \frac{96}{9597}$,$Q = \frac{97}{96 \times 98}$,and $R = \frac{1}{97}$,then which of the following is the smallest?

If $2p + \frac{1}{p} = 4$,then the value of $p^{3} + \frac{1}{8p^{3}}$ is:

If $m^{n} = 169$,what is the value of $(m+1)(n-1)$?

What will come in the place of the question mark $(?)$ in the following expression?
$\frac{343 \times 49}{216 \times 16 \times 81} = ?$