A textbook set for learning the basics of mathematics. As you can see in photos 2-4, the reference books have some writing in them, but the complete notebooks are new and unused. - Textbook Name: Systematic Mathematics 1 - Textbook Name: Systematic Mathematics 2 - Textbook Name: Plane Figures and Space Figures - Contents: Congruence conditions for triangles - Number of pages: 156 pages Thank you for looking.