-6(t-2u)^2-2(2u-t)
更新1:
急急急急急急急!!!!!!!!!!!!!!!!!!!
急急急急急急急!!!!!!!!!!!!!!!!!!!
收錄日期: 2021-04-25 17:07:33
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20111013000051KK00605