$21.9 \%$ of $(511.987 - 42.49) = \frac{?}{5.5}$

Simplify $\frac{(0.9743)^{3}-(0.0257)^{3}}{(0.9743)^{2}+(0.9743)(0.0257)+(0.0257)^{2}}$

If $1$ is added to the denominator of a fraction,the fraction becomes $\frac{1}{2}$. If $1$ is added to the numerator,the fraction becomes $1$. The fraction is

The square root of $\left[\frac{(3.25)^{3}}{3.25-1}-\left(3.25+(3.25)^{2}+1\right)\right]$ is equal to

$[(7.98)^{2} - (13.002)^{2} + (4.02)^{3}]^{2} = ?$

The sum of five consecutive even numbers of set $A$ is $220$. What is the sum of a different set of five consecutive numbers whose second lowest number is $37$ less than double of the lowest number of set $A$?