The shell command<br />"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/24bbf7a4a1f28f15a56213ba50787dd6.gif" -- '\Large  
b=\frac{2q}{a}=\frac{|{z_+z_-|}e^2}{4\pi\varepsilon_0\varepsilon_rak_BT} '<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>