The shell command<br />"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/31260798d3afd837f148aad62250a53c.gif" -- '\Large 
\Delta f = f(x+\Delta x,y+\Delta y) -f(x,y) = f_x\, \Delta x + f_y\, \Delta y +\text{virhetermi}.
 '<br />returned status = 126<br />
Image not found!<br />Please try the <a href="https://mycourses.aalto.fi/filter/tex/texdebug.php">debugging script</a>