[tex] \sqrt{ab}* \sqrt[3]{a} ^{2} => a^{ \frac{1}{2} } *b^{ \frac{1}{2} }*a^{ \frac{2}{3} }=>a^{ \frac{1}{2}+ \frac{2}{3} }*b^{ \frac{1}{2} }=a^{ \frac{7}{6} }*b^{ \frac{1}{2} }[/tex]
[tex] b^{2}* \sqrt{4} ^{3}= b^{2}* \sqrt{2} ^{2*3} = b^{2} * 2^{ \frac{6}{2} } = b^{2} * 2^{3} [/tex]