x(x²-1)-(x+2)(x²+1)=速度一点啊求
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x(x²-1)-(x+2)(x²+1)=速度一点啊求
x(x²-1)-(x+2)(x²+1)=速度一点啊求
x(x²-1)-(x+2)(x²+1)=速度一点啊求
x(x²-1)-(x+2)(x²+1)
=x³-x-(x³+x+2x²+2)
=-x-x-2x²-2
=-2x²-2x-2
-2x²-2x-2