计算9(x-1)²-(3x+3)(3x-1)
计算 x(x+3)-(x-1)(x-2)
计算5x(2x² -3x+1)
分式计算:x分之x²-1乘x+1分之x+(3x+1)
计算 ∫(x^4-2x^3+x^2+1)/x(x-1)² dx
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
计算:/3-x/+/x-1/(x>5).
x的三次方+3x²-4x-12(因式分解) x-1 分之X²-x-1计算
分式计算(3-x分之1-x)²÷[9-x²分之(1-x)(x+3)]²×(x-3)(x+1
计算(1).(5x-2)(x-3)-(3x-1)(x-4)= (2).(x+3)(x²+9)(x-3)=
计算 (5x-2)(x-3)-(3x-1)(x-4)= (x+3)(x²+9)(x-3)=
(x²-6x+9)÷x+3分之x²-9x+18,计算
x^2-1/x^2+4x+4÷(x+1)×x^2+3x+2/x-1计算