Export to LaTeX

This button has been replaced. LaTeX is now one of the forms the preview will hand you, and Export opens the equation in the editor for you.

To copy the LaTeX: Switch the preview to its LaTeX tab and press Copy. See copying and saving an equation.
To open it in the equation editor: Export opens the CodeCogs Equation Editor with the equation already in it.
To write LaTeX onto the sheet: No longer offered. Rendering always draws an equation; the LaTeX is taken from the preview instead. See copying and saving an equation.