Simplify:
$64^{-\frac{1}{3}} + 64^{\frac{1}{3}} - 64^{\frac{2}{3}}$
Simplify the following:
$(\sqrt{3}-\sqrt{2})^{2}$
Represent $5 . \overline{49}$ on the number line, using successive magnification, up to $4$ decimal places.
Find the value of $b$ :
$\frac{\sqrt{2}+\sqrt{3}}{3 \sqrt{2}-2 \sqrt{3}}=2-b \sqrt{6}$
State the number which is a whole number but not a natural number.