Question 251444
8c  -  5d^3
___    ____  reduce: 5/10=1/2

d^5     10c^5
(8c/d^5)-(d^3/2c^5)
(8c*2c^5-d^3*d^5)/(d^5)(2c^5)
(16c^6-d^8)/(d^5)(2c^5) 
(16c^6-d^8)/(2c^5d^5) ans.