x No Plagiarism!pkFBXOK2ShWZ9bKTNrOCposted on PENANA How to math?8964 copyright protection727PENANAknzlCuwuVe 維尼Did I do correctly?8964 copyright protection727PENANAJLGFS7AlzA 維尼18.191.66.109ns18.191.66.109da2