计算:3/(x+1)²-3x/(x-1)²=?
计算:3/(x+1)²-3x/(x-1)²=?
计算:(3/x)+(x/x²-1)-(4/1-x)
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
x(x²-1)+2x²(x+1)-3x(2x-5)计算
计算:2x/(x-2)(x+1)÷(1-x/x+1)-x²+2x/x²-4?
x的三次方+3x²-4x-12(因式分解) x-1 分之X²-x-1计算
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)=
3/(x-1)²-3x/(x-1)² 计算
计算-4x(3x²-2x-1)