Inserting Date, formatting to superscript and subscript

[louq]

Wondering if anyone can help. I used to have 3 very useful buttons on my tool bar. They have disappeared and now I can't get them back:

1) 'insert date' - press the button and the current date is inserted in a user-defined format. Not to be confused with date auto-fill.
2) 'superscript' - with text highlighted, pressing this button turns the text into superscript font.


3)'subscript' - ditto above but for subscript.

If anyone has any useful pointers on how to get these tool buttons back I would be ever so greatful.

Thanks for your help.

Lou