Incorrect. Remember that $\displaystyle{{2}}^{{x}}{{2}}^{{y}}={{2}}^{{{x}+{y}}}\usepackage{cmbright}\Huge\$ and $\displaystyle{{\left({{2}}^{{a}}\right)}}^{{b}}={{2}}^{{{a}{b}}}\usepackage{cmbright}\Huge\$ . Apply these rules to the problem and try again.