Respuesta:
15. 7x + 2y
16. -5a^2 + 4b^3
17. (5mn^2 + 13p)
18. -3v - 12vw
19. - 2/2 x^2y^2 - 1z
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Respuesta:
15. 7x + 2y
16. -5a^2 + 4b^3
17. (5mn^2 + 13p)
18. -3v - 12vw
19. - 2/2 x^2y^2 - 1z