This item was purchased at school. It is new and unused, but the name has been written on it, so the answer key has been cut out, and paper has been pasted over the problem set. There are creases on the cover of the answer key, so please refrain from purchasing if you are sensitive to such things. The appearance is not perfect, so I am open to price negotiations as much as possible. Please feel free to leave a comment. Thank you for looking.