In mathematics, an expression with numbers and symbols combines variables, constants, and operators to represent a value or relationship. Here are some common components of such expressions:

1. Numbers (Constants): Fixed values such as 2, 5, -3, 0.5, etc.
2. Variables: Symbols (often letters like $x$, $y$, or $z$) representing unknown values.
3. Operators: Symbols that represent operations. Common operators include:
   • Addition (+)
   • Subtraction (−)
   • Multiplication (× or ·)
   • Division (÷ or /)
   • Exponentiation (^)
4. Grouping symbols: Parentheses $( )$, brackets $[ ]$, or braces $\{ \}$ used to group parts of an expression.
5. Equality and inequality symbols: Symbols like $=$ (equal), $>$ (greater than), and $\leq$ (less than or equal to) compare values.

Example Expressions:

• $3x + 7$
• $5(a - 2) = 10$
• $\frac{x^2}{4} - 6 = 2$

These expressions can be evaluated, simplified, or solved depending on the type of problem.

Do you need details or have any questions about these concepts?

Here are five related questions:

1. How do you simplify algebraic expressions?
2. What is the difference between an expression and an equation?
3. How do you solve an expression with multiple variables?
4. What are the rules for evaluating expressions with parentheses?
5. How do you handle expressions with exponents?

Tip: Always follow the order of operations (PEMDAS) when solving expressions to ensure accuracy!