$\frac{4}{3}$ of a certain number is $64$. Half of that number is

$(13.99)^{2} - (15.02)^{2} + (18.07)^{2} - 36.64 = ?$

If $x[-2\{-4(-a)\}]+5[-2\{-2(-a)\}]=4 a,$ then $x=$

$A$ number when divided by a certain divisor leaves a remainder of $241$. When twice the number is divided by the same divisor,the remainder is $112$. Find the divisor.

$(2 \sqrt{392} - 21) + (\sqrt{8} - 7)^{2} = (?)^{2}$

Two-third of a positive number and $\frac{25}{216}$ of its reciprocal are equal. The number is