6x六次方y³÷｛x的五次方y³÷[x³÷（x³y²÷3x²y²）]｝,
=6x六次方y³÷｛x的五次方y³÷[3x³÷x]｝,
=6x六次方y³÷｛x的五次方y³÷[3x^2]
=18x六次方y³÷x^3y³
=18x^3
=18(-2)^3
=-144