update markdown help for enhanced equation syntax
update markdown help for enhanced equation syntax

brsimioni/rstudio,edrogers/rstudio,thklaus/rstudio,vbelakov/rstudio,thklaus/rstudio,pssguy/rstudio,suribes/rstudio,vbelakov/rstudio,nvoron23/rstudio,john-r-mcpherson/rstudio,brsimioni/rstudio,brsimioni/rstudio,piersharding/rstudio,jrnold/rstudio,maligulzar/Rstudio-instrumented,piersharding/rstudio,more1/rstudio,more1/rstudio,nvoron23/rstudio,jar1karp/rstudio,tbarrongh/rstudio,nvoron23/rstudio,githubfun/rstudio,maligulzar/Rstudio-instrumented,john-r-mcpherson/rstudio,thklaus/rstudio,tbarrongh/rstudio,john-r-mcpherson/rstudio,piersharding/rstudio,more1/rstudio,brsimioni/rstudio,vbelakov/rstudio,githubfun/rstudio,JanMarvin/rstudio,sfloresm/rstudio,sfloresm/rstudio,piersharding/rstudio,jrnold/rstudio,githubfun/rstudio,pssguy/rstudio,edrogers/rstudio,suribes/rstudio,jzhu8803/rstudio,piersharding/rstudio,jar1karp/rstudio,brsimioni/rstudio,jrnold/rstudio,vbelakov/rstudio,githubfun/rstudio,vbelakov/rstudio,suribes/rstudio,sfloresm/rstudio,jzhu8803/rstudio,john-r-mcpherson/rstudio,suribes/rstudio,piersharding/rstudio,pssguy/rstudio,edrogers/rstudio,githubfun/rstudio,sfloresm/rstudio,brsimioni/rstudio,john-r-mcpherson/rstudio,sfloresm/rstudio,JanMarvin/rstudio,jzhu8803/rstudio,jar1karp/rstudio,pssguy/rstudio,jzhu8803/rstudio,suribes/rstudio,brsimioni/rstudio,edrogers/rstudio,thklaus/rstudio,maligulzar/Rstudio-instrumented,vbelakov/rstudio,pssguy/rstudio,maligulzar/Rstudio-instrumented,maligulzar/Rstudio-instrumented,jrnold/rstudio,jzhu8803/rstudio,JanMarvin/rstudio,sfloresm/rstudio,pssguy/rstudio,pssguy/rstudio,john-r-mcpherson/rstudio,JanMarvin/rstudio,maligulzar/Rstudio-instrumented,thklaus/rstudio,more1/rstudio,sfloresm/rstudio,tbarrongh/rstudio,maligulzar/Rstudio-instrumented,edrogers/rstudio,vbelakov/rstudio,edrogers/rstudio,piersharding/rstudio,pssguy/rstudio,john-r-mcpherson/rstudio,nvoron23/rstudio,brsimioni/rstudio,nvoron23/rstudio,john-r-mcpherson/rstudio,nvoron23/rstudio,jrnold/rstudio,suribes/rstudio,nvoron23/rstudio,jrnold/rstudio,jrnold/rstudio,thklaus/rstudio,tbarrongh/rstudio,tbarrongh/rstudio,piersharding/rstudio,githubfun/rstudio,githubfun/rstudio,jzhu8803/rstudio,maligulzar/Rstudio-instrumented,edrogers/rstudio,jar1karp/rstudio,jar1karp/rstudio,maligulzar/Rstudio-instrumented,jrnold/rstudio,jar1karp/rstudio,vbelakov/rstudio,edrogers/rstudio,jrnold/rstudio,JanMarvin/rstudio,more1/rstudio,githubfun/rstudio,jar1karp/rstudio,JanMarvin/rstudio,suribes/rstudio,piersharding/rstudio,thklaus/rstudio,jar1karp/rstudio,JanMarvin/rstudio,more1/rstudio,thklaus/rstudio,JanMarvin/rstudio,jar1karp/rstudio,tbarrongh/rstudio,tbarrongh/rstudio,jzhu8803/rstudio,tbarrongh/rstudio,more1/rstudio,sfloresm/rstudio,jzhu8803/rstudio,JanMarvin/rstudio,suribes/rstudio,more1/rstudio