`e) \sqrt{3}(\sqrt{3}-\sqrt{12}+\sqrt{27})`
`=\sqrt{3}(\sqrt{3}-\sqrt{4.3}+\sqrt{9.3})`
`=\sqrt{3}(\sqrt{3}-2\sqrt{3}+3\sqrt{3})`
`=\sqrt{3}. 2\sqrt{3}`
`=2.3=6`
`h) \sqrt{5-2\sqrt{6}}-\sqrt{4-2\sqrt{3}}`
`=\sqrt{2-2.\sqrt{2}.\sqrt{3}+3}-\sqrt{3-2\sqrt{3}+1}`
`=\sqrt{(\sqrt{2}-\sqrt{3})^2-\sqrt{(\sqrt{3}-1)^2}`
`=\sqrt{3}-\sqrt{2}-\sqrt{3}+1`
`=1-\sqrt{2}`
`g) \sqrt{2-\sqrt{3}}-\sqrt{2+\sqrt{3}}`
`=\sqrt{(4-2\sqrt{3})/2}-\sqrt{(4+2\sqrt{3})/2}`
`=\sqrt{(\sqrt{3}-1)^2/2}-\sqrt{(\sqrt{3}+1)^2/2}`
`=\sqrt{2}/2 (\sqrt{3}-1-\sqrt{3}-1)`
`=\sqrt{2}/2. (-2)`
`=-\sqrt{2}`