The image contains several math problems involving expressions with square roots, simplifications, and basic operations. I'll start by transcribing and solving one of the problems. If you have a specific problem you'd like me to address first, please let me know!

Problem 386:

$\text{Замените сумму и произведение корней на одно выражение:}$ $2\sqrt{3} + 2\sqrt{5}$

Solution:

The problem asks to replace the sum $2\sqrt{3} + 2\sqrt{5}$ with a single expression if possible. However, since $\sqrt{3}$ and $\sqrt{5}$ are not like terms (they have different radicands), this expression cannot be simplified further into a single square root. Therefore, the simplest form of this expression is:

$2\sqrt{3} + 2\sqrt{5}$

Would you like details on how to approach any of the other problems in the image, or do you have specific questions? Here are five related questions you could consider:

1. How do you simplify expressions involving square roots?
2. What is the process of rationalizing a denominator with a square root?
3. How do you multiply and simplify expressions involving radicals?
4. What is the method to add or subtract radicals with different radicands?
5. How do you solve equations that contain square roots?

Tip: Always look for opportunities to simplify square roots before performing operations like addition or multiplication.