The expression is:

$\sqrt{3} + \sqrt{3}$

Since both terms are the same, we can combine them like this:

$2\sqrt{3}$

So, the simplified expression is:

$2\sqrt{3}$

Would you like more details or have any questions?

Here are 5 related questions to expand on this:

1. What is the decimal value of $\sqrt{3}$?
2. How would you simplify $3\sqrt{3} + 5\sqrt{3}$?
3. What is $\sqrt{3} \times \sqrt{3}$?
4. Can you simplify $2\sqrt{2} + 2\sqrt{3}$?
5. How do you handle the addition of different square roots, like $\sqrt{2} + \sqrt{5}$?

Tip: When combining radicals, make sure they are like terms, which means they must have the same radicand (the number inside the square root).