An expression that can have constants (like 4), variables (like x or y) and exponents (like the 2 in y

• no division by a variable.

• a variable's exponents can only be 0,1,2,3,... etc.

• it can't have an infinite number of terms.

^{2}), that can be combined using addition, subtraction, multiplication and division, but:• no division by a variable.

• a variable's exponents can only be 0,1,2,3,... etc.

• it can't have an infinite number of terms.

See: Exponent

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