I'm confused at around 17:25, detA*I shouldn't be detA^n*I? cause it is the matrix of detA,so each row can be divided over detA, so that is detA^n*I!####[['detA*I', 'Mathematical_Related_Concept', 'NEU'], ['detA^n*I', 'Mathematical_Related_Concept', 'NEU'], ['matrix of detA', 'Mathematical_Related_Concept', 'NEU'], ['detA', 'Mathematical_Related_Concept', 'NEU'], ['detA^n*I', 'Mathematical_Related_Concept', 'NEU']]