Copy Latex without using "+quote"?

[Stephen Tashi]

Is there a good way to copy a mathematical expression from a post into the message editor without using the "+quote" feature below the post?

Of course, if I highlight a mathematical expression in post and use copy-paste into the message editor, the expression doesn't get pasted as useful LaTex. It would be nice to have a "copy-as-LaTex" option - or a "copy from source" option, meaning that it would copy the content as it was originally composed in the message editor.

 

[mfb]

Right-click on the formula -> Show math as -> TeX commands

Example formula for tests: $\sum_{i=1}^{k} U_{k}$