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Calculation: 3x & sup2; * (- 2XY & sup3;) = (); (3x-1) (2x + 1) = ()
3x²*（-2xy³）= -6x³y³
（3x-1）（2x+1）= 6x²+x-1
(- 2XY & sup2;) & sup3; multiply by (3x & sup2; y) & sup2; + 4x & sup3; Y & sup2; multiply by the fourth power of 18x and the sixth power of Y
(- 2XY & sup2;) & sup3; multiply by (3x & sup2; y) & sup2; + 4x & sup3; Y & sup2; multiply by the fourth power of 18x and the sixth power of Y
=-8x³y^6*9x^4y²+4x³y²*18x^4y^6
=-72x^7y^8+72x^7y^8
=0
^Denotes power
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