Answer:
 10y3 - 5y2 - 10x + 4
 ————————————————————
 2y - 1 
Explanation:
Step by step solution :
Step 1 :
Equation at the end of step 1 :
 
 Step 2 :
Equation at the end of step 2 :
 
Step 3 :
 10y3 - 5y2 - 10x + 4
 Simplify ————————————————————
 2y - 1 
Checking for a perfect cube :
 3.1 10y3 - 5y2 - 10x + 4 is not a perfect cube
Final result :
 10y3 - 5y2 - 10x + 4
 ————————————————————
 2y - 1