计算:(1)x*x^m-1+x^2*x^m-2-3*x^3*x^m-3
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计算:(1)x*x^m-1+x^2*x^m-2-3*x^3*x^m-3
计算:(1)x*x^m-1+x^2*x^m-2-3*x^3*x^m-3
计算:(1)x*x^m-1+x^2*x^m-2-3*x^3*x^m-3
x*x^m-1+x^2*x^m-2-3*x^3*x^m-3
=x^(1+m-1)+x^(2+m-2)-3x^(3+m-3)
=x^m+x^m-3x^m
=-x^m
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