A short while ago I've come across one article which I assume you can find useful. Somebody will take a steaming dump all over it, but it clarified some of my questions. 
http://www.aldente.fi/powerpoint-presentations-will-definitely-generally-4/
http://warungmufu.com/2016/05/31/importance-of-over-the-internet-writing-services-28/
http://www.blog.katikbakliyat.com/our-custom-writing-service-is-as-wonderful-because-2/
http://cms.kirz.com/essays-and-its-altering-elements-of-significance-198/
http://warbotshack.online/2017/04/03/superb-judgement-for-all-of-your-writing-2/