Mathematical expressions are evaluated following the order of operations:

1. Parentheses - ( )
2. Exponents - ^ (not supported in this calculator)
3. Multiplication - *
4. Division - /
5. Addition - +
6. Subtraction - -

Examples:

• 2 + 3 * 4 = 2 + 12 = 14 (multiplication first)
• (2 + 3) * 4 = 5 * 4 = 20 (parentheses first)
• 20 / 4 + 2 = 5 + 2 = 7 (division first)