#mathhistoryUnmoderated tagAll postsExplore CommunitiesTrending CommunitiesNewcomers' CommunitySteemitCryptoAcademySteemit Feedbackআমার বাংলা ব্লগKorea • 한국 • KR • KOSTEEM CN/中文Steem POD TeamSteem AllianceComunidad LatinaWORLD OF XPILARAVLE 일상Beauty of Creativity#mathhistoryTrendingHotNewPayoutsMutedxaviorfx (32)in #mathhistory • 7 years ago11-181728 - 828 = 900