Thank you for viewing. This item was used for classes and test preparation. Therefore, there are writings as shown in the photos on pages 1, 5, 8, 9, 10, 13, 15, 17, 19. I think it would be helpful for checking during test preparation, etc. Other units have some highlighting and writing, but I think those parts are not a problem for use. There are no writings in the answer/explanation book. I put a name sticker on it because there was a name written. We are looking forward to your purchase!! Regular price: 748