-4分之3×(-2x²y)²×(-3分之1xy)-(-xy)³×(-x²),

-4分之3×(-2x²y)²×(-3分之1xy)-(-xy)³×(-x²),
-4分之3×(-2x²y)²×(-3分之1xy)-(-xy)³×(-x²),

-4分之3×(-2x²y)²×(-3分之1xy)-(-xy)³×(-x²),
-4分之3×(-2x²y)²×(-3分之1xy)-(-xy)³×(-x²)
=4分之9× 4x的4次幂y² × xy - x³y³ × x²
=9x的5次幂y³ - x的5次幂y³
=8x的5次幂y³