Complex sentence: On 4 December, he made his 100th appearance for United against his former club Everton and conceded a penalty just a few minutes after coming on as an 85th-minute substitute.
Split into simpler sentences: On 4 December, he made his 100th appearance at United coming on as a late substitution. He conceded a penalty against his former club Everton just a few minutes after coming on as an 85th-minute substitute.