Math Pi-rate Funny T-shirt

Aaargh Lads and Lassies, if you be somewhere off the mathematical coast of Somalia, awaiting some poor polynomial function or derivative- then this t-shirt is your uniform.
When you wear an eye patch and plunder yee some Trig functions- wearing this funny Pi-trate Math T-Shirt will really get you in the mood.
Professionally screenprinted long-lasting plunders the seas over.