(-3xy²)³+(-2x²)(-xy²)
=-27x³y6次方+2x³y²
（-5a^6)^2+(-2a^3)^3*a^3
=25a^12-8a^9*a^3
=25a^12-8a^12
=17a^12
(-3xy²)³+(-2x²)(-xy²) 化简
(-3xy²)³+(-2x²)(-xy²)
=-27x³y6次方+2x³y²
（-5a^6)^2+(-2a^3)^3*a^3
=25a^12-8a^9*a^3
=25a^12-8a^12
=17a^12