X²-3X+4化简
化简:x+(1/x-1)+(x²-3x+4/1-x²)
化简:-3x(x²+1)-[x³-x(4x²+1)].
3x⁷*x⁴+2x*x²*x⁴-4x⁵*(-x)²
3x²-【5x²+(3x²-2x)-(2x²-4x)】 化简
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
-(x²-2x)+(-3x+2x²)化简!
计算:(3/x)+(x/x²-1)-(4/1-x)
化简{x²-2x分之x+2-x²-4x+4x分之x-1}除以X分之(x-1)(X-4)乘以(2-x)
4x²-{-3x²-[5x-x²-(2x²-x)]+4x},其中x=½
化简:1x(x+1)+1(x+1)(x+2)+1(x+2)(x+3)+1(x+3)(x+4)
(2x-6)/(x²-4x+4)÷(3-x)/(x²+6x+9)×(2-x)/(x+3)
化简,x²+4x /(2x-4)(x+4)-x+2/x² -4