The expression given is:

$6a + 4b - 6$

There are no like terms to combine, but I can factor the expression for simplification. Here's the factored form:

$2(3a + 2b - 3)$

Would you like any further details or clarification?

Here are five related questions:

1. How do you factor expressions with more terms?
2. What is the difference between factoring and expanding an expression?
3. How would you solve $6a + 4b - 6 = 0$ for one variable?
4. Can this expression be simplified further if $a$ or $b$ are given specific values?
5. What if $a = 1$ and $b = 2$, what would the value of the expression be?

Tip:

Always check for common factors in algebraic expressions to simplify them before solving or substituting values.