👉 Bracketing is a type of mathematical notation used to express that a variable or expression is being used as an argument within another expression. It consists of parentheses, which are enclosed in square brackets, and are often used to denote the use of a variable or expression as part of another expression. For example: ``` x^2 + 3x - 4 ``` In this expression, x is the variable that is being used as an argument. The opening square bracket represents the value of