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int (dx)/(1+nsqrt(x+1)), n is a positive...

`int (dx)/(1+nsqrt(x+1))`, n is a positive integer.

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The correct Answer is:
`n[(z^(n-1))/(n-1)-(z^(n-2))/(n-2)+… -(z^(3))/(3)+(z^(2))/(2)-z+log|z+1|]+c`, when n is odd and
`n[(z^(n-1))/(n-1)-(z^(n-2))/(n-2)+… + (z^(3))/(3)-(z^(2))/(2)+z-log|z+1|]+c`when n is even; here `z=nsqrt(x+1)`.
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