The expression you provided appears to have a sequence of terms involving arithmetic and variables. Let's break it down and simplify it:

1. First Term: $-8$

2. Second Term: $4 + 4 = 8$

3. Third Term: $3$

4. Fourth Term: $x + 3x = 4x$

5. Fifth Term: $5$

6. Sixth Term: $y + 5y = 6y$

Simplified Expression:

The entire expression can now be written as: $-8 + 8 + 3 + 4x + 5 + 6y$

Now, let's combine the constant terms: $-8 + 8 + 3 + 5 = 0 + 3 + 5 = 8$

Thus, the final simplified expression is: $8 + 4x + 6y$

Would you like further details or explanations?

Related Questions:

1. How do you factor expressions like $x + 3x$?
2. What are like terms, and how do you combine them?
3. How do you solve linear equations involving multiple variables?
4. How do constants affect algebraic expressions?
5. What is the distributive property in algebra?

Tip: When simplifying algebraic expressions, always combine like terms (terms with the same variables raised to the same powers).