Instant purchase is welcome. Please read the profile. This is the answer key only. I don't see any writing, and it was hardly used. * There is a fold on the cover, and the part with the name on the back cover has been cut out. Since this is a used item inspected by an amateur, I think those who are sensitive to such things should refrain from purchasing. If you can't tolerate even a small mistake, please refrain from purchasing. m(__)m #Exercises #SystematicMathematics #SelfStudy #Sokei (Keio and Waseda Universities) #Difficult #HighSchoolEntranceExam #Kumon #AdvancedSchools #AdvanceStudy #Difficult #DeviationValue #JuniorHighAndHighSchoolIntegrated #Geometry #Figures #TestPreparation #MidtermExam #FinalExam #MidtermTest #FinalTest #SchoolRecord #Sokei (Keio and Waseda Universities) #HighSchoolEntranceExam #InternalStudents #SukenShuppanCo.Ltd. #FinalExam #FinalTest #JuniorHighAndHighSchoolIntegrated #JuniorHighSchool #Algebra #Quantity #Mathematics #Textbook #Inequality #CompletionNote - Title: Systematic Problem Collection Mathematics 1 Answer Key - Advanced Thank you for viewing.