A reference book for deepening a systematic understanding of mathematics. - Title: High Stage Mathematics for Integrated Junior and Senior High Schools, Algebra, Volume 1 - Author: Ei Fujimura - Publisher: Toshin Books - ISBN: 978-4-8905-4417 - Price: 1400 yen (excluding tax) Thank you for viewing. The answer key can be removed, but it is still attached. There is a tear on the outer photo part, but the inside is clean. There are no markings or signs of use, but please understand that I may have missed something.