计算:(x+5)²-2(x+5)(x+3)+(x+3)²
x(x²-1)+2x²(x+1)-3x(2x-5)计算
x/x-3-5x/x^2-x-6计算
计算:(3x²-2x-5)(-2x+3)
计算(x²+2x+3)(2x-5)
计算5x(2x² -3x+1)
计算[(x²-5x+6)/(x²-4x+3)]+[(x²-4x+3)/(x²-2
计算:[(-5+x)(-x-5)]² (x+3)²-(x+2)(x-1) (3x-a)(3x+a)(
计算: (x+3)(x²-x-2)
计算 (x+3)(x²-x-2)
计算:2X²-5X+X²+4X-3X²-2
计算:3x/x-5-2x/5-x
计算x²+4/x+3+x²-x-6/x+3-2x²-2x-5/x+3=