Parentheses are one of the most commonly used mathematical symbols, which are usually used to represent mathematical operations and grouping. The contents in brackets are usually regarded as a whole and can be used with other mathematical symbols through operators such as multiplication, addition and exponent. The left side of the bracket is the open end and the right side is the closed end. The content of a range or the whole formula is expressed between the two ends, which is used to limit the operation range or distinguish the priority.

In mathematics, parentheses are also used to represent functions. Generally speaking, the contents in parentheses are independent variables, and the output result of the function is expressed as the value outside parentheses. The use of brackets is closely related to basic mathematical operations, and can also be used to represent various complex functions and formulas. At the same time, the position and number of brackets are also very important, and different arrangements may lead to completely different results.

Besides mathematics, brackets are also widely used in other fields. In computer science, parentheses are usually used to represent commands, functions or variables in programming languages. In daily life, brackets are often used to write, express and explain expressions and sentences. Although the meaning and usage of brackets are simple, they are an important part of the foundation of mathematics and computer science, which needs us to understand and learn.