`2/\sqrt{3} +\sqrt{2}/3+ 2/\sqrt{3} . \sqrt{5/12-1/\sqrt{6}}`
`=2\sqrt{3}/3+\sqrt{2}/3+2/\sqrt{3}. \sqrt{5/12-2\sqrt{6}/12}`
`=(2\sqrt{3}+\sqrt{2})/3+2/\sqrt{3}. \sqrt{(5-2\sqrt{2.3})/12}`
`=(2\sqrt{3}+\sqrt{2})/3+2/\sqrt{3}. \sqrt{(\sqrt{3}-\sqrt{2})^2/12}`
`=(2\sqrt{3}+\sqrt{2})/3+2/\sqrt{3}. (\sqrt{3}-\sqrt{2})/(2\sqrt{3})`
`=(2\sqrt{3}+\sqrt{2})/3+(2\sqrt{3}-2\sqrt{2})/6`
`=(4\sqrt{3}+2\sqrt{2}+2\sqrt{3}-2\sqrt{2})/6`
`=(6\sqrt{3})/6`
`=\sqrt{3}`