Incorrect. Because the exponent on the outside of the parentheses is 3, you must multiply $\displaystyle\frac{{1}}{{3}}\cdot\frac{{1}}{{3}}\cdot\frac{{1}}{{3}}\usepackage{cmbright}\Huge\$ . Remember that you must also multiply the exponents within the parentheses by the exponent on the outside of the parentheses.