x²+z²=y²

https://images.plurk.com/6vdChb6RcSzM4KGbdXobH5.jpg https://images.plurk.com/3ALcp9qbMJFSVkCg7EJrJd.jpg https://images.plurk.com/1qBDxUzFYayg0GuOWH6QKq.jpg
1AJ2心結
載入新的回覆