Respuesta :

sqdancefan

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Answer:

  9y^3 -7y -5

Step-by-step explanation:

  3y^3-y-5-5-6y+5+6y^3  . . .  given

There are terms of degrees 3, 1, and 0. Combining them gives ...

  y^3(3 +6) +y(-1 -6) +(-5 -5 +5)

  = 9y^3 -7y -5