Q. Simplify : ${\left(\frac{2}{9}\right)}^{-5}\times {\left(\frac{2}{9}\right)}^3$
$Q. What is the value of {\left|\left(7^{-1}-8^{-1}\right)\right|}^{-1}-{\left|\left(3^{-1}-4^{-1}\right)\right|}^{-1}?$
Q. Simplify the following and express with positive exponents : -
a. ${\left(\frac{1}{9}\right)}^3\times {\left(\frac{1}{9}\right)}^{-5}$                   b. ${\left|{\left(\frac{5}{4}\right)}^{-1}\times {\left(\frac{2}{5}\right)}^{-1}\right|}^{-1}$
Q. Find the value of x, if ${\left(\frac{2}{3}\right)}^{-5}\times {\left(\frac{2}{3}\right)}^{12}={\left(\frac{2}{3}\right)}^{3x-2}$