Simplify:

$\displaystyle \frac{{{x}^{{{2}/{3}}}{y}^{{-{4}/{3}}}{x}^{{{8}/{3}}}{y}^{{{4}/{3}}}}}{{{x}^{{-{1}/{2}}}{y}^{{{1}}}}}$

Entry Tip: put the numerator and denominator in parenthesis. Also put the exponents in parenthesis. To type $\displaystyle \frac{{a}^{{\frac{{1}}{{2}}}}}{{b}^{{\frac{{2}}{{3}}}}}$ type (a)^(1/2)/(b^(2/3)). Be sure to use the preview button and be sure you like the format before you hit submit!