Matt 21:16 cut excess wording, "They thought that Jesus should not be allowing the children to say that, so " not in the text and covered in the notes. Also changed "children" to "people" because all the people are included in the Greek "these" used as a pronominal adjective.
Matt 21:15 cut excess wording, "because they did not believe that Jesus was the Christ." This is not in the text and is interpretive. This is already in the notes.