Question 153227
(-5x^2y^5)(-7x^7 y^4)
-5x^2y^5
-7x^7y^4
---------------
35x^9y^9

 6ab^4c
 _______= 6ab/5c
 5b^3c^2 


3^2a^4b^-7
_____________  = 9d^5/ab^3c^2   
a^5b^-4c^2d^-5

(3x^2y^-3)^-5=y^15/243x^10