This is a textbook, "New Junior High School Problem Collection: Mathematics 2nd Year," only available at cram schools. It includes answers and explanations. There are no writings, but there might be some oversights. There are folds and stains from use in cram school or class. Please consider this item as a used product that has been handled by people. Please refrain from purchasing if you are looking for perfection or are overly concerned about condition. Packaging will be done using recycled materials (used paper bags, etc.).