The shell command<br />"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/516bc98d5ee26ce8002ebd821f1ea4cd.gif" -- '\Large 
  f_{xy}(x,y)=\frac{-3xy^2}{2(x^2+y^3)^{3/2}} \quad\Rightarrow\quad f_{xy}(1,2)= -\frac{2}{9},
  '<br />returned status = 126<br />
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