Correct. The one that is not solved correctly is $\displaystyle{3}\cdot{2}-{3}\cdot{2}={12}\usepackage{cmbright}\Huge\$ . Since multiplication should be evaluated before subtraction, $\displaystyle{3}\cdot{2}-{3}\cdot{2}={6}-{6}\usepackage{cmbright}\Huge\$ , which equals 0.