(1-x/3-x)²/(3-2x-x²/9-x²)³*(x²/x
(2x²-2x+3)(-x³+x-1)
x²+3x+9/(x²-27)+6x/(9x-x²)-(x-1)/(6+2x)
(1-x/3-x)²/(3-2x-x²/9-x²)³*(x²/x
1.(x²-9)/(x²+2x²+x)*(3x³+9x²)/(x
4x²-1/3x²-x·9x³-x/2x^4-x³计算 急
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
6x+(2x²-3x)-(x²-1)
(x+1)/(x²+3x+2)+(x²-2x)/(x²-4)
x(x²-1)+2x²(x+1)-3x(2x-5)计算
①2(x+3)(x-3)=x²+(x-1)(x+1)+2x
(x-1)(2x²-3x+2)-x(x+1)(x-2)
3x³-2x*x²