(5)(-2x²)×(-y)+3xy×(1-3分之1x);(6)(-6x²)²+(-3x)³×x
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(5)(-2x²)×(-y)+3xy×(1-3分之1x);(6)(-6x²)²+(-3x)³×x
(5)(-2x²)×(-y)+3xy×(1-3分之1x);(6)(-6x²)²+(-3x)³×x
(5)(-2x²)×(-y)+3xy×(1-3分之1x);(6)(-6x²)²+(-3x)³×x
(5)(-2x²)×(-y)+3xy×(1-3分之1x)
=2x²y+3xy-x²y
=x²y+3xy
;(6)(-6x²)²+(-3x)³×x
=36x^4-3x^4
=33x^4
原式=2x²y+3xy-x²y
=x²y+3xy
原式=36x^4-27x³×x
=36x^4-27x^4
=9x^4