计算:(x+2)(x-2)-(1-2x)(2x-1)
计算 x(x+3)-(x-1)(x-2)
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
计算:(1)(2x/x+2)的平方×x+2/x(x-2)-(1/x-2-1/x+2)
计算:(1+1/x)·x²-2x+1/x²-1;(x²/x-1-2x/1-x)÷x/x-1
计算5x(2x² -3x+1)
x^2-1/x^2+4x+4÷(x+1)×x^2+3x+2/x-1计算
计算:[(x²-2x+1)/(x²-1)]÷[(x-1)(x²+x)]-x
计算3x(x^2-x-1)-2x^2(1-x)
计算 2(x²-x+1)-(-2x+3x²)+(1-x)
计算,3x(x平方-2x-1)-2x平方(x-3)
计算:(1)x²/x-2 - 4x/x-2 + 4/x-2;
计算 ∫(x^4-2x^3+x^2+1)/x(x-1)² dx