You may have correctly simplified the expression to $\displaystyle{2}+{{\left(-{2}\right)}}^{{2}}\usepackage{cmbright}\Huge\$ , but then incorrectly squared $\displaystyle-{2}\usepackage{cmbright}\Huge\$ and got $\displaystyle-{4}\usepackage{cmbright}\Huge\$ . Remember that a negative number squared is positive. The correct answer is 6.