[math-fun] about a certain François Mendzina Essomba and surprising pi formulas

Hello funsters and for some Pi fans, I was contacted by a certain François Mendzina Essomba from Cameroun. He showed to me some formulas for pi, the first one was kind of surprising, then he sent me a couple of others , They are surprising, at first sight : it resembles the ones about the AGM, but I am not certain, you may judge by yourself here, : https://www.facebook.com/photo.php?fbid=1261279953954407&set=gm.137398368268... https://www.facebook.com/photo.php?fbid=1261281097287626&set=pcb.13739847926... and here is the facebook page : https://www.facebook.com/search/top/?q=Fran%C3%A7ois%20Mendzina%20Essomba Does anyhone has ever see any of this ? not me. Best regards, Simon Plouffe