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(2x + 3)/(sqrt(x^(2)+ 4 x + 1 ))...

`(2x + 3)/(sqrt(x^(2)+ 4 x + 1 ))`

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The correct Answer is:
` = 2 sqrt (x^(2) + 4 x -+ 1 ) - log | x + 2 + sqrt(x^(2) + 4 x + 1 )| + c `
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