计算5ab^3*(-3/4a^3b^2)*(-2/3ab^4c)^3 x(x-1)(x+3)-x^2(x+1)+3x-1
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计算5ab^3*(-3/4a^3b^2)*(-2/3ab^4c)^3x(x-1)(x+3)-x^2(x+1)+3x-1计算5ab^3*(-3/4a^3b^2)*(-2/3ab^4c)^3x(x-1)(
计算5ab^3*(-3/4a^3b^2)*(-2/3ab^4c)^3 x(x-1)(x+3)-x^2(x+1)+3x-1
计算5ab^3*(-3/4a^3b^2)*(-2/3ab^4c)^3 x(x-1)(x+3)-x^2(x+1)+3x-1
计算5ab^3*(-3/4a^3b^2)*(-2/3ab^4c)^3 x(x-1)(x+3)-x^2(x+1)+3x-1
5ab^3*(-3/4a^3b^2)*(-2/3ab^4c)^3
=5ab³×(-3/4a³b²)×(-8/27a³b^12c^3)
=10/9a^7b^17c³
x(x-1)(x+3)-x^2(x+1)+3x-1
=x(x²+2x-3)-x²(x+1)+3x-1
=x³+2x²-3x-x³-x²+3x-1
=x²-1
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