Here is the original book cover. As you can see, the work "Mathematics" has also been Photoshopped on. In the original image, the book reads "Student Roll Call" in Japanese.

Thai education officials were left red-faced after someone on Twitter discovered that a porn star was gracing the cover of a university math textbook. According to England's Metro, publisher Muang ...

Porn star appears on cover of Thai math textbook MuangThai Book recalled "Basic Mathematics" textbooks after a picture of a "teacher" on the cover was found to be a promotional still from a porn film.