`e) (\sqrt{1/3}-\sqrt{4/3}+sqrt{3}):\sqrt{3}`
`=(1/3\sqrt{3}-2/3\sqrt{3}+\sqrt{3}):\sqrt{3}`
`=2/3\sqrt{3}:\sqrt{3}`
`=2/3`
`f) \sqrt{3-\sqrt{5}}:\sqrt{2}`
`=\sqrt{6-2\sqrt{5}}:2`
`=\sqrt{5-2\sqrt{5}+1}:2`
`=\sqrt{(\sqrt{5}-1)^2}:2`
`=|\sqrt{5}-1|:2`
`=(\sqrt{5}-1)/2`