Complex sentence: Boruto's bad action drives him to cheat the exam with Katasuke's inventing device called the Kote, only for Naruto to disqualify Boruto during the match with Shikadai Nara.
Split into simpler sentences: Boruto's bad action drives him to cheat the exam with Katasuke's inventing device called the Kote. However, Naruto disqualifies Boruto during the match with Shikadai Nara.