In that case, you need to know the rules about which operations to do first. In normal algebra, powers have a higher priority than multiplications and divisions; and these, in turn, have a higher priority than addition and subtraction.
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Use the hierarchy rule for the order in which the operations need to be evaluated.
Yes, an expression can have more than one variable.
The algebraic expression of the product of 5 and 2 more than a number can be represented as 5 * (x + 2), where x represents the unknown number. This expression simplifies to 5x + 10 when multiplied out. It is important to remember the order of operations in algebra, where multiplication takes precedence over addition.
You might mean an inequality (with 'less than', 'greater than', etc). You might mean an expression.
The expression for m more than 2 is2 + m
A numerical expression is simply a set of numbers separate by mathematical operations, but without an equality (or inequality) sign. The equality or inequality sign would make it an equation rather than an expression. Examples of mathematical operations are addition, subtraction, multiplication, division, exponents, logarithms, trigonometric functions, factorials.