[tex] \sqrt[3]{81} [/tex]
[tex] \sqrt[3]{9} \times \sqrt[3]{3} - 7 \sqrt{2} \times \sqrt{18} [/tex]
[tex] \frac{ \sqrt{112} }{ \sqrt{66} } \times \sqrt{2} [/tex]
[tex] \frac{ \sqrt{506} }{ \sqrt{5} } \times \frac{ \sqrt{17} \times \sqrt{34} }{ \sqrt{2} } [/tex]
​