1. The problem is to understand the concept of "notation" in mathematics and how to use it effectively. 2. Notation is a system of symbols and signs used to represent numbers, operations, relations, and other mathematical objects clearly and concisely. 3. For example, the plus sign $+$ denotes addition, the equals sign $=$ denotes equality, and variables like $x$ or $y$ represent unknown values. 4. Using notation helps us write mathematical expressions and equations in a standardized way, making it easier to communicate and solve problems. 5. For instance, the expression $2 + 3 = 5$ uses notation to show that adding 2 and 3 results in 5. 6. When explaining or solving problems, always define your notation clearly to avoid confusion. 7. In summary, notation is the language of mathematics, and mastering it is essential for understanding and expressing mathematical ideas.