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int(dx)/(1+sqrt(x^(2)+2x+2))=(A/7)(log|x...

`int(dx)/(1+sqrt(x^(2)+2x+2))`=`(A/7)(log|x+1+sqrt(x^(2)+2x+2)|)-(sqrt(x^(2)+2x+2)-1)/(x+1)+C`, then A equal to.

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7
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