x^n-1(3x^n+4x^n+1-5x^n+2)
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x^n-1(3x^n+4x^n+1-5x^n+2)x^n-1(3x^n+4x^n+1-5x^n+2)x^n-1(3x^n+4x^n+1-5x^n+2)是不是计算x^(n-1)·[3x^n+4x^(n+
x^n-1(3x^n+4x^n+1-5x^n+2)
x^n-1(3x^n+4x^n+1-5x^n+2)
x^n-1(3x^n+4x^n+1-5x^n+2)
是不是计算 x^(n-1)·[3x^n+4x^(n+1)-5x^(n+2)]
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