tolong ya kak nomor 4d beserta caranya...

=x^-9y^-15/x^-8y^-8 : x^5y^-3 / x^4y
=x^-9+8y^-15+8 : x^5-4y^-3-1
=x^-1y^-7 : x^1y-4
=x^-1-1y^-7-4
=x^-2y^-11