### Possible Answer

First, you group the same variable, becomes: =3a^2b + 2a^2b^2 + a^2b^2 - ab^2 = 3a^2b + 3a^2b^2 -ab^2 --- > a^2b^2 is the same as 1a^2b^2, just add the coefficients and rewrite the variable. Remember: only digits with the same variable could be sum up. - read more

Simplifying (2a + 6 * 2)(3a + 3) + a Multiply 6 * 2 (2a + 12)(3a + 3) + a Reorder the terms: (12 + 2a)(3a + 3) + a Reorder the terms: (12 + 2a)(3 + 3a) + a Multiply (12 + 2a) * (3 + 3a) (12(3 + 3a) + 2a * (3 + 3a)) + a ((3 * 12 + 3a * 12) + 2a * (3 + 3a)) + a ((36 + 36a) + 2a * ... - read more

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