What will come in the place of question mark $(?)$ in the following expression?
$561 \div 35.05 \times 19.99 = ?$

If $a+\frac{1}{a}+2=0,$ then the value of $\left(a^{37}-\frac{1}{a^{100}}\right)$ is

The value of $2.1\overline{36}$ is

If $2x + \frac{2}{x} = 3$,then the value of $x^3 + \frac{1}{x^3} + 2$ is

Which of the following statement$(s)$ is/are $TRUE$?
$I.$ $33^{3} > 3^{33}$
$II.$ $333 > (3^{3})^{3}$

What approximate value will come in place of the question mark $(?)$ in the given equation? (You are not expected to calculate the exact value)
$\frac{7702}{43.96} + 25.11 \times 45.88 = ? \times 15$