- $\left({x}^{2}\right){3}{+}{3}^{3}${ }^
- $\left({x}^{2}\right){3}{-}{3}^{3}$^
- $\left({x}^{2}\right){3}{+}{9}^{3}$^
- $\left({x}^{2}\right){3}{-}{9}^{3}$^