What is the definition (in understandable language) of like terms. Can I see an examle too?

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"like" terms are two or more terms where the variable part of the term, including the exponents are the same, with only the coefficients being different

e.g. 4(x^3)(y^2) and -2(x^3)(y^2) are like terms but

4(x^3)(y^2) and -2(x^2)(y^2) are not