Ok, now I want to share a minor tip about how to write cm-1 very fast and very simple (in Microsoft Word). First of all discussion about this shortcut, I want to be clear: ctrl+c -> ctrl+v. This is commonly used shortcut, but in some cases (for whatever reason) we can not use. What to do? There is an alternative? The answer is YES, there is an alternative.
Select text: -1 and press ctrl++ for subscript and ctrl+shift++ for superscript.
The HTML tag for superscript and subscript is very simple: this is for <sub>subscript</sub> and this is for <sup>superscript</sup>.
Animated example for superscript: