I've used it a little, but there's almost no writing, so I think you can use it in very good condition. A collection of mathematics problems from Kobe University, 5th edition, containing problems from 2008 to 2022. - Title: Kobe University Mathematics 15 Years [5th Edition] - Publisher: Kyogakusha - Publication Year: 2008-2022 - Price: 2,500 yen - ISBN: 978-4-325-58184-6 Thank you for looking.