The problem is to simplify the expression $(2y^3 - 3y + 5) + (y^2 + 3y - 4)$. We need to combine like terms.

1. Problem Description

The problem is to simplify the expression $(2y^3 - 3y + 5) + (y^2 + 3y - 4)$. We need to combine like terms.

2. Solution Steps

First, we remove the parentheses:

$2y^3 - 3y + 5 + y^2 + 3y - 4$

Next, we group like terms together:

$2y^3 + y^2 + (-3y + 3y) + (5 - 4)$

Then, we simplify:

$2y^3 + y^2 + 0y + 1$

Finally, we have:

$2y^3 + y^2 + 1$

3. Final Answer

$2y^3 + y^2 + 1$