(-15mn²+ 6m²n -9m) + (-13m²n-2m+3) realiza las sumas ayudenme porfiiiiiiiissss les doy 25 puntod porfaaaaavoooooooooorrrrrrrr porfavoooooooooooooooooooorrrrrrr
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Explicación paso a paso:
6m2n−13m2n−15mn2−9m−2m+3−7m2n−15mn2−9m−2m+3−7m2n−15mn2−11m+3