I purchased this but it turned out not to be what I needed, so I'd like to offer it to someone who can use it. - Title: Systematic Problem Collection Mathematics 1 Algebra Edition Standard - ISBN: 978-4-10-231071-2 Thank you for looking. There are no markings inside, but there is a name written on the back. For those who understand that this is a used item stored at home, thank you in advance.