How to stop Word's formula editor from changing my formula?

[tfseak]

I have a formula in which there is, for example, g'(x). When I add an equal sign or something after the equal sign, Formula Editor keeps on changing my g'(x) to g'^(x) (the (x) part is changed to superscript)!

You could see this problem in the following video:

https://1drv.ms/v/s!Aqxvphznmq3RhMY2L8HFxLEvPnBcuA?e=NXqAE1

or https://youtu.be/gs9tURuUCk4

Here's another screenshot showing a similar issue:

And I have attached a test file for this example.

Could someone tell me how to stop Formula Editor from acting like a "moron"? Can't it understand the derivative of function?

[#2 · Accepted solution]

@tfseak You can undo the conversion to Professional Format by immediately pressing CTRL+Z or click on the Undo button

However, you can prevent it from happening by accessing the Equation Options dialog (click on the dialog launcher in the Conversions section of the Equation tab of the ribbon) and uncheck the box for "Automatically convert expressions to professional format"

If necessary, you can manually convert individual or all equations from one format to another by accessing the Convert dropdown in the Conversion section of the Equation tab of the ribbon.

[#3]

@Doug_Robbins_Word_MVP 

Yes! 👍👍👍

The Ctrl+Z is a solution.  But since the default behaviour affects everything and every time, I prefer your 2nd suggestion by changing the option permanently.

If I could give you 100 stars, I would do so.

Thanks a lot.

[#4]

@Doug_Robbins_Word_MVP 

Now why this option does not exist in onenote? and is there any alternative option to disable the correction altogether?