#mathhistoryUnmoderated tagAll postsExplore CommunitiesTrending CommunitiesNewcomers' CommunitySteemit FeedbackSteemitCryptoAcademyআমার বাংলা ব্লগKorea • 한국 • KR • KOSteem AllianceSTEEM CN/中文WORLD OF XPILARAVLE 일상Steem POD TeamSCT.암호화폐.CryptoTron Fan Club#mathhistoryTrendingHotNewPayoutsMutedxaviorfx (32)in #mathhistory • 7 years ago11-181728 - 828 = 900