化简 (x^2+3x+1)(x^3+x^2-2)+3x^4+4x^2+5

x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x |X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| 化简3x^2(x-1)-3x(x^2+1)+4x(2X-5) x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4) 约分 (X的平方+4x+3)(2x-x)^/(X^+X)(X^+X-6), 2x+3x+4x+5x+x+6x+7x=100 已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值 化简：1x(x+1)+1(x+1)(x+2)+1(x+2)(x+3)+1(x+3)(x+4) 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),