If $2x + y = 17$,$y + 2z = 15$,and $x + y = 9$,then the value of $4x + 3y + z$ equals:

$48 \div 12 \times \left( \frac{9}{8} \text{ of } \frac{4}{3} + \frac{3}{4} \text{ of } \frac{2}{3} \right) = ?$

$\frac{3}{5}$ of $\frac{4}{7}$ of $\frac{5}{9}$ of $\frac{21}{24}$ of $504 = ?$

The difference between $1 \frac{3}{16}$ and its reciprocal is:

If $x = \sqrt{3} + \frac{1}{\sqrt{3}}$,then the value of $\left(x - \frac{\sqrt{126}}{\sqrt{42}}\right) + \left(x - \frac{1}{x - \frac{2\sqrt{3}}{3}}\right)$ is

$22 \frac{2}{9} + 33 \frac{4}{7} - ? = 28 \frac{4}{45}$