To simplify the expression $2\sqrt{3} + \sqrt{6} - \sqrt{3}$, we can combine like terms:

1. Notice that $2\sqrt{3}$ and $-\sqrt{3}$ are like terms (both involve $\sqrt{3}$).
2. Combine these like terms: $2\sqrt{3} - \sqrt{3} = (2 - 1)\sqrt{3} = \sqrt{3}$
3. Now, the expression becomes: $\sqrt{3} + \sqrt{6}$

The simplified expression is $\sqrt{3} + \sqrt{6}$.

Would you like more details on this process or have any other questions?

Here are 5 related questions you might find interesting:

1. How do you simplify expressions involving radicals with different bases?
2. Can you add or subtract terms with different square roots, like $\sqrt{2}$ and $\sqrt{3}$?
3. What is the process to rationalize the denominator in a fraction with radicals?
4. How can you multiply expressions containing square roots?
5. How do you solve equations that include square roots?

Tip: Always look for like terms when simplifying expressions, especially those involving square roots, to combine them easily.