Here's a few links to the ASII codes using the ALT key on your keyboard. Not all programs or, in our case, board accept all the codes. ie. While alt 0178 will return the squared symbol ² & alt 0169 ill return the copywrite symbol © , alt 8531 will not return the small version of 1/3 instead you get S. http://www.angelfire.com/ak2/timothydrew/altkeys.html#math http://usefulshortcuts.com/alt-codes/maths-alt-codes.php https://forlang.wsu.edu/help-pages/microsoft-keyboards-standard-english-us101/