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int2^3(dx)/sqrt(x^2-2)...

`int_2^3(dx)/sqrt(x^2-2)`

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`int_2^3(dx)/sqrt(x^2-2)`
`[In(x+sqrt(n^2-2)]_2^3`
`In(3+sqrt7)=In(2+sqrt2)`
`In((3+sqrt7)/(3+sqrt2))`
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