Thank you for viewing. ◆ "Short-Term Conquest University Entrance Common Test Mathematics I・A Practical Edition" ◆ "Short-Term Conquest University Entrance Common Test Mathematics II・B・C Practical Edition" This is a set of two books. I have gone through them once. Regarding writing: There are no writings in the answers, but there are a few check marks on the problems I couldn't solve. I have erased the ones I noticed with an eraser. There may be some remaining marks. Please understand this before purchasing.