Respuesta:
a) 4x²y⁷ + -13x²y⁷ = -9x²y⁷
b) -5x²y⁷ - 4x²y⁷ = -9x²y⁷
c) -4x²y⁷ -5x²y⁷ +13x²y⁷ = 4x²y⁷
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Respuesta:
a) 4x²y⁷ + -13x²y⁷ = -9x²y⁷
b) -5x²y⁷ - 4x²y⁷ = -9x²y⁷
c) -4x²y⁷ -5x²y⁷ +13x²y⁷ = 4x²y⁷