int0^1(xdx)/((2x+1)(x+1))...

`int_0^1(xdx)/((2x+1)(x+1))`

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`int_0^1(xdx)/((2x+1)(x+1))`
int_0^1((1/(x+1)-1/(2x+1))dx
` [In(x+1)-1/2In(2x+1)]_0^1`
`In2-1/2(In3)=In(2/sqrt3)`

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