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series summation: $$\sum_{n=0}^{\infty}\frac{n(n-2)}{n+1}x^{n-1}$$ where $-1

is there a convinient function that sums the above series? (unsure but this may be an expanded taylor series?)

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    somehow the range of x isnt displaying clearly: x is greater than -1 and less than 12012-09-06

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