I am further away than before.....

Now, I use Kilroy's method as such. I will try to be as painfully detailed as I can..... Try not to giggle at the Dinosaur!

Opened a clean new Word Doc.

Press Ctrl F9.

Field brackets appear with 2 spaces inside I keep formatting marks on most of the time.

Place cursor inside field brackets and type eq\o(0,/).

Click outside the field brackets then select / highlight the field brackets and the equation inside.

Press Shift F9.

The entire entry deletes!
I tried again, and removed all spaces from within the field brackets.

Now Shift F9 returns "Error"

Tried Macropod's equation, with capital letters for eq and with "show formatting" off.
Shift F9 deletes the entry as in the first example.

I am pretty sure the mistake I am making is one that many of you avoid through experience, or that I am "over-complicating" to make the change. I may not even recognize some of the terminology.

Here is a snip of the autocorrect panel under Options/Proofing that I see:

Well, that didn't work. I guess the snipping tool won't paste in here.
If you could see the autocorrect panel, all boxes are checked, and the radio button for "formatted text" is pressed, and the "with" field has a Paragraph mark in it and will not take any text entry. The "replace" field will take entries. I rather thought that an Arial zero (0) would go there but Kilroy suggested a shortcut (*0)?

Anyway, I am still stumped!