Output of this command is different in wxmaxima and imaxima. What option
control this behavior?
In wxmaxima:
(%i1) tex('diff(y,x));
$${{d}\over{d\,x}}\,y$$
(%o1) false
In imaxima emacs mode:
(%i28) tex('diff(y,x));
$$y_{x}$$
(\%o28) \mathbf{false}
P.S. sorry for my English