解(有点错误,正在修改)
(5y/6x^3)^2除以(负5y^2分之3x^4)^3
=(25y^2/36x^6) 除以(-125y^6分之27x^12)
=-(25y^2/36x^6)*(125y^6/27x^12)
=-(25*27/36*125)*x^6*y^8
=-5^5**x^6*y^8