If $${b\over a}=0.7$$ find the value of $${a-b\over a+b}={11\over34}.$$

What should come in place of the question mark (?) in the following mathematical statement?
$${{?^6÷16=108}}$$

If m + n = 1, then what will be the value of m³ + n³ + 3mn?

The value of $$5-{8+2\sqrt{15} \over4}-{{1}\over8+2\sqrt{15}}$$ is equal to:

The value of $${0.7×0.7×0.7+0.3×0.3×0.3}\over {0.7×0.7-0.7×0.3+0.3×0.3}$$ is

if $${x\over 9}+{8\over x}=1$$, then the value of x³ is :

If p = 99, then value of p(p² + 3p + 3) is

The value of $${1.6×1.6×1.6−1.6×1.6×1.6}\over 1.6×1.6+1.6×1.6+1.6×1.6 $$ is