计算6/x^2-1/(x+3)-(x-1)/(6+2x)

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计算6/x^2-1/(x+3)-(x-1)/(6+2x)
计算6/x^2-1/(x+3)-(x-1)/(6+2x)

计算6/x^2-1/(x+3)-(x-1)/(6+2x)
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