What will come in the place of the question mark $(?)$ in the following equation?
$(23.1)^{2} + (48.6)^{2} - (39.8)^{2} = ? + 1147.69$

What is the difference between the biggest and the smallest fraction among $\frac{2}{3}, \frac{3}{4}, \frac{4}{5}$ and $\frac{5}{6}$?

What approximate value will come in the place of the question mark $(?)$ in the following expression? (You are not expected to calculate the exact value.)
$\frac{989}{34} \div \frac{65}{869} \times \frac{515}{207} = ?$

If $(a+\frac{1}{a})^{2}=3,$ then $a^{3}+\frac{1}{a^{3}}=?$

$\frac{0.0203 \times 2.92}{0.0073 \times 14.5 \times 0.7} = ?$

If $p=99,$ then the value of $p(p^{2}+3p+3)$ is