(3y分之2x²）²乘4x分之3y+2y²分之x²除以xy分之3
=4x^4/9y^2*3y/4x+x^2/2y^2*xy/3
=x^3/3y+x^3/(6y)
=(2x^3+x^3)/(6y)
=x^3/(2y)^这是平方么？^这是平方