This is a set of Mathematical Foundations Problem Structure for Mathematics IA IIBC. There are no markings. Notes: * I have a cat (I will try my best to prevent cat hair from getting in). * I will reply within 24 hours whenever possible. * I will ship within a week unless there are special circumstances (I will write about any circumstances in my profile). There may be some minor bending or folding, and the item has been stored at home, so please purchase only if you understand and accept this!