i-Work 2 Mathematics - Answer Key & Explanation I have checked and found no writing, but there may be oversights due to my amateur inspection. A name was written on the answer key, so I have covered it with paper, but there is some bleed-through. The cover of the answer key and explanation has a faint black mark, as you can see in the photos. It is in relatively good condition, but please understand that this is a used item.