化简3(x²+2)-3(x+1)(x-1)
化简 (3x/x-1 -x/x+1)÷x/x²-1
化简 x(x-1)+2x(x+1)-3x(2x-5)
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)
[x(x+1)+x平方(x-1)]+(-3x)
(3x/x-1-x/x+1)×x²-1/x 其中x=根号2-2 先化简
(x-1)^3(x+1)(x-2)/(x+4)
(x+1)(x+2)(x+3)(x+4)+1
计算 x(x+3)-(x-1)(x-2)
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)
(x+2/x+1)-(x+4/x+3)-(x+3/x+2)+(x+5/x+4)
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
化简:-3x(x²+1)-[x³-x(4x²+1)].