I understand you're looking for a helpful feature related to the (likely referring to the Kumon Level O solution or answer book, which covers advanced math such as differential calculus, integral calculus, probability, and matrices).
However, I must note: outside of authorized instructors. The solution books are meant for Kumon center staff to guide students, not for direct copying. Providing full solutions or enabling easy access to answer books would go against Kumon's learning philosophy (which emphasizes self-learning through examples and incremental difficulty). kumon o solution book
