`A=(10+2\sqrt{10})/(\sqrt{5}+2)+(8)/(1-\sqrt{5})`
`A=((10+2\sqrt{10})(\sqrt{5}-2))/((\sqrt{5}+2)(\sqrt{5}-2))+(8(1+\sqrt{5}))/((1-\sqrt{5})(1+\sqrt{5}))`
`A=(10\sqrt{5}-20+10\sqrt{2}-4\sqrt{10})/(1)+(8(1+\sqrt{5}))/(-4)`
`A=10\sqrt{5}-20+10\sqrt{2}-4\sqrt{10}-2(1+\sqrt{5})`
`A=10\sqrt{5}-20+10\sqrt{2}-4\sqrt{10}-2-2\sqrt{5}`
`A=8\sqrt{5}+10\sqrt{2}-4\sqrt{10}-22`