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Ejemplo
2a + 2a = 4a si se suma
2a² + 2a = 2a²+2a solo queda asi
a. (5x^2 + 7x + 8) + (3x + 9 )
5x² + 10x + 17
b. (4mn - 2mn - 5n) + (6m^2 + 7mn)
2mn - 5n + 6m² + 7mn
9mn - 5n + 6m² ordenas
6m² + 9mn - 5n
c. (-9a^3b^2 + 7a^2b - 6) + 12a^3b^2 - 9a^2b - 5)
-9a^3b^2 + 12a^3b^2+ 7a^2b - 9a^2b - 5 - 6
3a³b² - 2a²b - 11