A mathematics textbook that covers everything from algebraic calculations to the basics of calculus. - Title: Basic Mathematics - Authors: Kaoru Ozawa, So Nagai, Koji Fujita, Kazuo Takemura - Contents: From algebraic calculations to the basics of calculus - Price: 1500 yen - Publisher: Kakyo-bo The book has been carried around, so there are folds and stains. Also, there are some handwritten notes on several pages, as shown in the third image.