What is the least common multiple for this problem??

Question

5y^6+5y^5-10y^4 and 2y^8+8y^7+8y^6. Thanks for all of your help!

Answer 1

5y^4
5y^6+5y^5-10y^4 = 5y^4(y^2+y-2)

and

2y^6
2y^8+8y^7+8y^6 = 2y^6(y^2+4^y+4)