What will come in the place of the question mark $(?)$ in the following equation?
$3463 \times 295 - 18611 = ? + 5883$

The value of $\frac{1}{2} + \frac{1}{2 \cdot 3} + \frac{1}{2 \cdot 3 \cdot 4} + \frac{1}{2 \cdot 3 \cdot 4 \cdot 5}$ is correct to three places of decimal:

If $\frac{a}{a+b}=\frac{17}{23},$ what is $\frac{a+b}{a-b}$ equal to?

$\frac{\frac{1}{3}+\frac{1}{3} \times \frac{1}{3}}{\frac{1}{3}+\frac{1}{3} \text{ of } \frac{1}{3}}-\frac{1}{9} = ?$

The value of $1 + 1 + \frac{1}{4 \times 3} + \frac{1}{4 \times 3^{2}} + \frac{1}{4 \times 3^{3}}$ up to four places of decimals is

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