The shell command
"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/90334603e9b0e6e0fb755144c02786dc.gif" -- '\Large y_1(t)=e^{-5t}\cos(6t)'
returned status = 126
Image not found!
Please try the debugging script