The shell command<br />"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/ed5846e834b91f81f2987ba05d4a3e9f.gif" -- '\Large \begin{aligned}b_n &= a_{n+1}-a_{n} \\
		&= \frac{(n+1)^2+(n+1)}{2} - \frac{n^2+n)}{2} \\
		&= \frac{(n+1)^2+(n+1)-n^2 - n }{2} \\
		&= \frac{(n^2+2n+1)+1-n^2}{2} \\
		&= \frac{2n+2}{2} \\
		&= n + 1.\end{aligned}'<br />returned status = 126<br />
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