$12.1212 + 17.0005 - 9.1102 = ?$

$3640 \div 14 \times 16 + 340 = ?$

What will come in the place of the question mark $(?)$ in the following equation?
$23 \times 15 - 60 + ? \div 31 = 292$

Manmohan spends $\frac{1}{5}$ part of his money as pocket money and $\frac{4}{5}$ of the remainder in other affairs. If he is left with $Rs.\, 48$ per month,what is his monthly income? (in $Rs.$)

If $\frac{x-a^{2}}{b+c}+\frac{x-b^{2}}{c+a}+\frac{x-c^{2}}{a+b}=4(a+b+c),$ then $x$ is equal to:

What will come in the place of the question mark $(?)$ in the following expression?
$\frac{343 \times 49}{216 \times 16 \times 81} = ?$