x No Plagiarism!vJk769tHrN4V0LfW22l0posted on PENANA How to math?8964 copyright protection721PENANALAJfuXSq2O 維尼Did I do correctly?8964 copyright protection721PENANA1KonHtcaPF 維尼3.140.188.57ns3.140.188.57da2