Step-by-step explanation:
[tex]27. \: {x}^{4} {y}^{6} [/tex]
[tex]28. \: {x}^{4} {y}^{6} [/tex]
[tex]29. \: 9 {x}^{6} 9 {y}^{7} [/tex]
[tex]30. \: \frac{( {x}^{ \frac{1}{2} } ) }{ {x}^{ \frac{1}{2} } } [/tex]
[tex]31. \: 2 {x}^{2} [/tex]
[tex]32. \: {x}^{2} \sqrt{2 {y}^{2} } [/tex]