(3xy)³*(-2/3x²y)+3x(x²y²)²-(-x的四次方-3)*xy的四次方其中x=-1y y=2
=27x³y³×(-2x²y/3)+3xx^4y^4+x^5y^4+3xy^4
=-18x^5y^4+3x^5y^4+x^5y^4+3xy^4
=-14x^5y^4+3xy^4
=-14×(-1)×16+3×(-1)×16
=11×16
=176;
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