/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: ArayaMath https://public.slidesharecdn.com/v2/images/profile-picture.png Tutor Mathematics P'Pond สอนพิเศษ คณิตศาสตร์ ม.1 - ม.6 ID Line : pondaraya