x²+2x/x²-6x+9÷x²-4/x²-3x ,
(2x-6)/(x²-4x+4)÷(3-x)/(x²+6x+9)×(2-x)/(x+3)
x²+2x/x²-6x+9÷x²-4/x²-3x ,
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
分式计算x²+2x/x²-6x+9÷x²-4/x²-3x
分式计算:x²+2x/x²-6x+9÷x²-4/x²-3x
计算①x²-4/x²-4x+3÷x²+3x+2/x²-x②2x+6/4-4x+x
x²+3x+9/(x²-27)+6x/(9x-x²)-(x-1)/(6+2x)
3x⁷*x⁴+2x*x²*x⁴-4x⁵*(-x)²
计算分式2x-4/x²+3x÷x-2/x²+6x+9
X²-6x+9 x²-9 x+3
6x+(2x²-3x)-(x²-1)
((x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x