(x-3)(x+3)(x²-9)化简
-(x²-2x)+(-3x+2x²)化简!
X²-6x+9 x²-9 x+3
化简[(2X-3/X)-1]/(X平方-9/X)
(x-3)(x+3)(x²-9)化简
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)
(2x-6)/(x²-4x+4)÷(3-x)/(x²+6x+9)×(2-x)/(x+3)
化简:1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+...+1/(x+8)(x+9)
(x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+13)化简
化简 (3x/x-1 -x/x+1)÷x/x²-1
化简X-X^2-X^3-X^4-...X^9+X^10