Describing the converse feature of the "tools->import formula"
for instance "tools->export formula"

Suppose you have a odt document with a formula object.

One way to get a say a MathML markup of a formula in object mode : 
* Enter the object in the odt document
* Select all and copy the open office math formula commands
* Open new application instance of open office math
* Paste the commands into the command window
* Use saveas to save in mathml or any other desired format.

Currently in the object context the save/save-as present the 
  invoking application's (writer's) saving formats which is for 
  containing document, which isn't what is being looked for.

Desired:
* A menu item from which presents a dialog which asks
  what to copy to clipboard mathml 1.0, mathml variant etc etc
  and additionally for binary formats, another saveas menu 
  in object mode to directly save to the other format.
* An right click on object by an optionally enabled item on context menu 
  that does the same