That looks like the description of an EXPRESSION. However, an expression need not have "at least one operation"; a single number, or variable, is a perfectly valid expression.
Literal Equation
the answer is an algebraic expression!
An algebraic expression.
yes it should contain one variable or more.
alebraic expression! :p
it is a one-step equation
The awnser is an algebraic expression!
An algebraic expression.
Variable expression.
An algebraic expression can have a mixture of numbers and variables, but it does not contain an equals sign.
5+3x(7-2)