<tr>
<td> first
<td> second
<tr>
<td> what
<td> ever
I find it simpler and cleaner than any of the markdown table markups f'(n) = f(n+1) - f(n)
Then the fundamental theorem is just a telescopic sum: f(b) - f(a) = \sum_a^b f'(n)
what's the problem with xeyes? it reads data on your computer and displays it. Just like vim or cat.
If, for some reason, you want to run a program that you don't trust, you should sandbox it from the outside. But granting full rights to distro-provided programs like vim or xeyes is perfectly sane. Just like you trust your kernel.