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Evaluate : int2^3x/(x^2+1)dx...

Evaluate : `int_2^3x/(x^2+1)dx`

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`int_2^3x/(x^2+1)dx`
let,
`(x^2+1)=t`
`2xdx=dt`
when,
`x=2` then `t=5`
`x=3` then `t=10`
so,
...
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