find the median of -43

I think the Math Formula tab was used to enter this question.  See for example:

$$\mathrm{ERROR}{\mathtt{\,-\,}}{\mathtt{22}}{\mathtt{\,-\,}}{\mathtt{22}}{\mathtt{\,-\,}}{\mathtt{20}}$$

I used the Math Formula tab and entered: find the mean -22 -22 -20 to get this. The Math Formula tab doesn't like spaces between words; it thinks words are variable names.

When placing the cursor over ERROR --22 --22 --20, I see:

Find the mean, median, and the mode of: 3,18,-22,-22,-20..so:

EDIT: Uh oh, I accidentally used 20 instead of -20!

EDIT 2: Updated!

What are you talking about Aziz?

It looks like this for some reason:

ok that is weird!

Thanks Alan, that makes sense now :)