Rewrite the following expressions using just one rational exponent. Enter the numerator and denominator of the exponent. Cancel any common factors.
$\frac{ u^\frac{2}{3}u^{\frac{1}{4}}}{ u^{\frac{1}{2}}u^{\frac{1}{6}}} = u^{\frac{a}{b}}$ where $a=$ and $b =$ .
$\frac{ u^\frac{3}{4}u^{\frac{1}{3}}}{ u^{\frac{2}{3}}u^{\frac{5}{6}}} = u^{\frac{a}{b}}$ where $a=$ and $b =$ .
Hint: Put together what you learned in the preceding few problems.