As simple as a textbook

The textbook has the word Precalculus on the front. It is very smooth and it is in the shape of a square. The book has a left side of a cover, and the right side is covered in pages. I have to open the front of the book to get into the books pages. The pages in the book are very flimsy and easy to tear so I must be careful. I see a lot of numbers and equations in the book so it must be a math book. In the book it has problems for me to do and words for me to read. That is as simple as a textbook is.