Break my bot

[mlugo2]

I need help testing my Facebook bot, Interpretron.

https://www.facebook.com/Interpretron/

It's basically a Lips interpreter attached to a bot, it can only do simple arithmetic commands like:
* 2 3
+ 4 3
/ 54  (* 34 2)

If you want to help me break it I'll need your facebook username to add you as a tester.
Thanks!