How can I insert the symbol for 'squared' or 'cubed' (small sized 2 or 3) into my text?

The 'ctrl + shift + +/-'  works in Windows but not in my Acrobat file. Copy/pasting does not work either (my small 2 becomes a regular sized 2) - just like in this form. 

Also tried finding the  'glyph' pannel, in case I could extract from there, but did not succeed.

Thank you.