Correct. Applying the rules of exponents, you simplify the numerator and the denominator of the fraction, and then use the property $\displaystyle\frac{{{x}}^{{n}}}{{{x}}^{{m}}}={{x}}^{{{n}-{m}}}\usepackage{cmbright}\Huge\$ to simplify it further. The expression simplifies to $\displaystyle{{a}}^{{6}}{{b}}^{{15}}{{c}}^{{6}}\usepackage{cmbright}\Huge\$ .