TMS FNC Core installed and the runtime package added to the project.
TMS FNC WX Pack installed.
Add the component
Drop TTMSFNCWXMathEditor from the component palette onto a form.
Set InsertionMode to control how the cursor inserts symbols.
Assign OnResult to receive the expression output when the user confirms their entry.
Retrieve the expression
{ In an OnResult event handler: }
procedure TForm1.MathEditor1Result(Sender: TObject;
AResult: TTMSFNCWXMathEditorResultEvent);
begin
ShowMessage(AResult.LaTeX);
end;