# AoPS Wiki:Sandbox

Welcome to the sandbox, a location to test your newfound wiki-editing abilities.

Please note that all contributions here may be deleted periodically and without warning.

In the computer world, a sandbox is a place to test and experiment -- essentially, it's a place to play.

This is the AoPSWiki Sandbox. Feel free to experiment here.

Warning: anything you place here is subject to deletion without notice.

### Sandbox Area

<problem> <contest>AIME</contest> <version>I</version> <year>2007</year> <probnum>3</probnum> <question> Prove that $a^2+b^2=c^2$ in a right triangle. </question> <solution> "Because I said so" -- Pythagoras </solution> </problem>

If anybody knows how to embed XML tags in a Wiki page so that they don't display, but are still there, please post here.

<script type='text/javascript' language='javascript'> alert("If this display, it seems like a huge security flaw."); </script>

$\mathrm{Test\;of\;mathrm}$ I am also testing dollars signs: $x+3=5$$5+3=x$ Testing dollar signs $x^2 + 3 = 4$

Testing multiple dollar signs: $r^2+2 = 7$ and then, $r^3-2 = 9$

 $x^2 + 3 = 4$

Dollar signs. $\dfrac{y}{r}=\sin \theta$ $\frac{m}{n}$ $$cheesecake$$ LaTeX doesn't show up in the previews. $\frac{\sqrt{b^2-4aq}}{2\pi+3\pi+4\pi$ (Error compiling LaTeX. ! File ended while scanning use of \frac .)

test