Incorrect. Remember to square the monomial $\displaystyle{\left({3}{{x}}^{{5}}{y}\right)}\usepackage{cmbright}\Huge\$ before multiplying it by $\displaystyle{2}{x}\usepackage{cmbright}\Huge\$ . You can also think about this expression like this: $\displaystyle{\left({3}{{x}}^{{5}}{y}\right)}{\left({3}{{x}}^{{5}}{y}\right)}{\left({2}{x}\right)}\usepackage{cmbright}\Huge\$ . Does that help you simplify this expression?