# How do you simplify 4y^4 + 3y^2 + y^4?

There are two like terms = $4 {y}^{4}$ and ${y}^{4}$.
Add all like terms together: $4 {y}^{4} + {y}^{4} = 5 {y}^{4}$.
Therefore your simplified answer is $5 {y}^{4} + 3 {y}^{2}$.