Complex sentence: After receiving some jeering from a disgruntled crowd he reacted by raising his middle finger to them, and asking to be substituted, having been substituted he repeated his actions and then received a red card.
Split into simpler sentences: After receiving some jeering from a disgruntled crowd he reacted by raising his middle finger to them, and asking to be substituted. Having been substituted he repeated his actions and then received a red card.