I'm building an education related product with some friends and we're planning on using exercises we find on various books for the guides.
Our question is if the math exercises belong to them and nobody else can use them (since every books states "Partial or complete reproduction of the book is illegal").
Research: I understand very little about laws, but for what I understand I believe "pure math" is not patentable, and a math exercise should be considered pure math. Am I right?
Looking forward to see what more savvy users have to say!