Correct. Applying the Distributive Property to $\displaystyle-{\left({2}{{x}}^{{2}}+{4}{{x}}^{{2}}\right)},{2}{\left(-{4}{{x}}^{{2}}{y}+{3}{y}\right)}\usepackage{cmbright}\Huge\$ , and $\displaystyle-{\left({7}{y}+{12}{{x}}^{{2}}-{1}\right)}\usepackage{cmbright}\Huge\$ gives you $\displaystyle{8}{{x}}^{{2}}{y}-{2}{{x}}^{{2}}-{4}{{x}}^{{2}}+{13}-{8}{{x}}^{{2}}{y}+{6}{y}-{7}{y}-{12}{{x}}^{{2}}+{1}\usepackage{cmbright}\Huge\$ . Simplifying this equation yields $\displaystyle-{18}{{x}}^{{2}}-{y}+{14}\usepackage{cmbright}\Huge\$ .