Insert Equations Into Cell instead of as floating object
Allow the math equation objects created by "Insert>Equations" to be embedded in a single cell, rather than just a floating object. I would like to use nicely formatted equations as row or column headers and to describe the data or calculations nearby. As a floating object, they lose relative positioning as cell height or width are changed. If embedded in a cell, I would expect the fit to width or height commands to adjust to fit the equation.
2 comments

Marshall commented
The "Move and size with cells" does work to fix the relative positioning problem as does "Move but don't size with cells". When I tried it before it wasn't working so somehow the "Don't move or size with cells" must have been selected.
There's still the problem of fit to width or height commands. If an equation object could be inserted into a cell, it would fix the additional problems of 1) Insert Equation adds the equation to the middle of the page, independent of what cell I had selected, so I have to then manually drag and move it to where I want, 2) As an object in the cell, I would expect it to be the only content in the cell. Right now values or calculation equations can be (accidentally) inserted into the cells underneath the Equation Objects content and makes it hard to select the cell underneath later. To select and delete content underneath an equation that covers a cell, the equation must be temporarily moved, or a nearby cell selected, and the keyboard used to navigate to it (tab, enter, or arrow keys).
I think the related suggestion is a very helpful idea, useful for editing an equation that calculate values in a cell, whereas the suggestion I gave complements it in relation to documentation, and manual control of appearance and formatting equations as labels. 
Kenneth Barber commented
Your 2nd last sentence is incorrect. Rightclick on your equation and go Format Shape, Size & Properties, Properties. There, you can choose whether or not the equation moves or sizes with cells.
Related suggestion:
https://excel.uservoice.com/forums/304921excelforwindowsdesktopapplication/suggestions/9594621inexcelformulabarallowdisplayofformulaseq