(x+4)²(x-4)²-(3x+2)²(3x-2)²

3x⁷*x⁴+2x*x²*x⁴-4x⁵*(-x)² (x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3 4x²-{-3x²-[5x-x²-(2x²-x)]+4x},其中x=½ (2x-6)/(x²-4x+4)÷(3-x)/(x²+6x+9)×(2-x)/(x+3) (x+1)/(x²+3x+2)+(x²-2x)/(x²-4) (x-2分之3x-x+2分之x)乘x分之x²-4 计算①x²-4／x²-4x+3÷x²+3x+2／x²-x②2x+6／4-4x+x 计算[(x²-5x+6)/(x²-4x+3)]+[(x²-4x+3)/(x²-2 计算x²-4/x²-x-2 乘以 x²-x/x²+3x+2 分式计算x²+2x／x²-6x+9÷x²-4／x²-3x x²＋2x/x²-6x+9÷x²-4/x²-3x , 分式计算：x²+2x／x²-6x+9÷x²-4／x²-3x