计算:2x×(1/2x²-1)-3x(1/3x²+2/3))
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计算 x(x+3)-(x-1)(x-2)
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(x³-x+1)/(x²-1)-(x²+x)/(x-1)+(2x+3)/(x+1)
计算3x²-[5x-(1/2x-3)+2x²]
计算:3x²-[5x-(1/2 x-3)+2x²]
计算(-x³+2x²-5)(2x²-3x+1)
x(x²-1)+2x²(x+1)-3x(2x-5)计算
x^2-1/x^2+4x+4÷(x+1)×x^2+3x+2/x-1计算
计算3x(x^2-x-1)-2x^2(1-x)
计算,3x(x平方-2x-1)-2x平方(x-3)