Gakken "Nankan Daigaku Gokaku Line Hantei Mondai-shu Suugaku I・A + Data de Katsu!" (Difficult University Pass Line Judgment Problem Collection: Mathematics I・A + Win with Data!) Purchased 5 or 6 years ago and stored with little to no use. There are no writings or folds, and it's in almost new condition. Feel free to comment!