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style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>Mathematicians 
use TeX for superscripts. It can be extended it to include Unicode, making 
XeTeX.</DIV></DIV>
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style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'><A 
title="https://www.overleaf.com/learn/latex/Articles/What's_in_a_Name:_A_Guide_to_the_Many_Flavours_of_TeX" 
href="https://www.overleaf.com/learn/latex/Articles/What's_in_a_Name:_A_Guide_to_the_Many_Flavours_of_TeX">https://www.overleaf.com/learn/latex/Articles/What's_in_a_Name:_A_Guide_to_the_Many_Flavours_of_TeX</A></DIV></DIV>
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style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>Isn’t 
that the way to go ?</DIV></DIV>
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style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>Raymond 
Mercier</DIV></DIV></DIV></DIV></DIV></DIV></DIV></BODY></HTML>