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Efectuati inmultirile si reduceti termenii asemenea:
(-7xy*)*3xy la puterea a doua+2x la puterea doua(-5y la puterea a treia)-3x la puterea a doua(-6y la puterea doua)


Răspuns :

(-7xy*)*3xy²+2x²(-5y³)-3x²(-6y²) =
=-21x²y³-10x²y³+18x²y² =
=-31x²y³+18x²y²