Good Questions for Science Students: Mathematics 1・A・2・B by Takashi Oishi Price: ¥1000 #TakashiOishi #Takashi_Oishi #Book #Nature/Mathematics This is a textbook used by my child. There are dates and notes written in light pencil in various places. It doesn't seem to have any markings in red pen. This book shows a fair amount of use, and compared to other textbooks I have for sale, it has a noticeable used feel.