If $0.13 \div p^{2} = 13$,then $p$ equals

$\sqrt{54} \times \sqrt{2120} \div \sqrt{460} = ?$

If $\sqrt{1+\frac{x}{9}}=\frac{13}{3}$,then the value of $x$ is

If $a = \frac{\sqrt{5} + 1}{\sqrt{5} - 1}$ and $b = \frac{\sqrt{5} - 1}{\sqrt{5} + 1}$,then the value of $\frac{a^{2} + ab + b^{2}}{a^{2} - ab + b^{2}}$ is

If $\sqrt{1+\sqrt{1-\frac{2176}{2401}}}=1+\frac{x}{7},$ the value of $x$ is

$\frac{14}{3+\sqrt{2}}=?$