【计算(过程)】-x^2*(-x)^3+3x^3*(-x^2)-4(-x)*(-x)^4
【计算(过程)】-x^2*(-x)^3+3x^3*(-x^2)-4(-x)*(-x)^4
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x^2-1/x^2+4x+4÷(x+1)×x^2+3x+2/x-1计算
计算4x^2-[2x-(x^2-2x+3)-2(x^2-3x)]
计算:x^2-9/4-x^2*x^2+x-2/x^2-4x+3,
4x²-[2x-(x²-2x+3)-2(x²-3x)] 计算