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(x^2+3x+9)/(x^2-9)+6x/(9x-x^2)-(x-1)/(6+2x)

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(x^2+3x+9)/(x^2-9)+6x/(9x-x^2)-(x-1)/(6+2x)
化简
(x^2+3x+9)/(x^2-9)+6x/(9x-x^2)-(x-1)/(6+2x)
(x^4-8x^3-108x^2-252x-81)/(2x^4-12x^3-54x^2+144x+432)
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| (x+2/x^2-x-6)-(2x/x^2-3x)-(x+1/x^2-6x+9) x+2/x^2-x-6 + 2x/x^3-3x - x+1/x^2-6x+9 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 计算:(x+2)/(x^2 - x - 6) + 2x/(x^2 - 3x) - x/(x^2 - 6x + 9) y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1 设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10), 求化简：（x^2+3x+9)/(x^2-27)+(6x)/(9x-x^2)-(x-1)/(6+2x) 化简(x^2+3x+9)/(x^3-27)+(6x)/(9x-x^2)-(x-1)/(6+2x) x²+3x+9/(x²-27)+6x/(9x-x²)-(x-1)/(6+2x) 化简~(x²+3x+9/x²-27)+(6x/9x-x²)-(x-1/6+2x) 求x^2-3x/x^2-6x+9*x^2-11x+30/x^2-5x-1