$\frac{69842 \times 69842 - 30158 \times 30158}{69842 - 30158} = ?$

If $x+\frac{2}{3+\frac{4}{5+\frac{7}{6}}}=10$,then the value of $x$ is

The simplified value of the following expression is: $\frac{1}{\sqrt{11-2 \sqrt{30}}}-\frac{3}{\sqrt{7-2 \sqrt{10}}}-\frac{4}{\sqrt{8+4 \sqrt{3}}}$

If $\left(-\frac{1}{2}\right) \times (x - 5) + 3 = -\frac{5}{2}$,then what is the value of $x$?

What will come in the place of the question mark $(?)$ in the following equation?
$2 \frac{1}{8} - 1 \frac{1}{16} = ? + 1 \frac{1}{32} - 1 \frac{9}{64}$

What value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)
$22.9889 \div ? = 23$