What will come in the place of the question mark $(?)$ in the following expression?
$25.05 \times 123.95 + 388.999 \times 15.001 = ?$

Simplify $\left(\frac{1}{64}\right)^{0}+(64)^{-1 / 2}+(-32)^{4 / 5}$

In an examination,a student was asked to find $\frac{3}{14}$ of a certain number. By mistake,he found $\frac{3}{4}$ of it. His answer was $150$ more than the correct answer. The given number is

$\left(\frac{10.3 \times 10.3 \times 10.3 + 1}{10.3 \times 10.3 - 10.3 + 1}\right)$ is equal to (in $.3$)

The value of $(3+\sqrt{8})+\frac{1}{3-\sqrt{8}}-(6+4 \sqrt{2})$ 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