91Ó°ÊÓ

A mathematical expression is a combination of numbers, symbols, and operators (like +, −, ×, ÷) that represents a value. Expressions can be as simple as a single number or as complex as formulas used in algebra. For example, the expression \( 2 + 3 \times 4 \) involves both addition and multiplication. When simplifying an expression, always follow the order of operations, often remembered by PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction). In our exercise, the expression \( -3 \times 6 \) doesn't need further simplification beyond the multiplication. The final simplified result is \( -18 \). Always make sure to handle each part of the expression carefully.