The mathematical expression in the uploaded image is:

$(\sqrt{4} + \sqrt{5} - \sqrt{5})^2$

Step-by-Step Solution:

1. Simplify inside the parentheses: $\sqrt{4} + \sqrt{5} - \sqrt{5}$ Since $\sqrt{5} - \sqrt{5} = 0$, the expression simplifies to: $\sqrt{4}$

2. Evaluate $\sqrt{4}$: $\sqrt{4} = 2$

3. Square the result: $(2)^2 = 4$

Final Answer:

$4$

Would you like a detailed explanation of any specific step? Here are some related questions you might explore:

1. What is the general rule for simplifying expressions involving square roots?
2. How do we expand and simplify squared binomials like $(a + b)^2$?
3. Why does $\sqrt{a} - \sqrt{a}$ equal 0 for any value of $a$?
4. Can all square roots be simplified to whole numbers?
5. What are some common mistakes to watch out for when simplifying square root expressions?

Tip: Always simplify expressions inside parentheses first before applying other operations!