A method of combining the same terms (about mathematics)

In polynomials, terms with the same letters and degrees are called similar terms. For example,

Polynomial 3a2-4ab2-5a2-7+ 15ab2+29

3a2 and-5a2 are similar terms.

-4ab2 and 15ab2 are similar projects.

-7 and 29 are similar projects.

Similar terms in polynomials can be combined, and the rule of combining similar terms is that when the coefficients of similar terms are added together, the results are taken as coefficients, and the indexes of letters remain unchanged.

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