???? ?? ???? ???? ?? ??????: ?????? ????? ????? ???? ?? ?????? ???? ??? ?????? ???????: ?????? ????? ????? ???? ?? ?????? ????? ??? ??????? ?????? ???????? ????? ??????? ??????? ???? Application of answers to solve textbooks, curricula for all Saudi educational stages ???? All alternatives are online with no downloading directly from the book ?