Fully expand and simplify:

Question

(5y+8)(5y^3+5y+4)

The simplified expression is:

Answer 1

25y^4 + 25y^2 + 20y^3 + 40y^2 + 20y + 32

This can be further simplified to:

25y^4 + 20y^3 + 65y^2 + 20y + 32