Don't copy-paste commands from webpages...

[sgunhouse]

These days it makes more sense to put a good calculator on your phone, and those could possibly be susceptible. Then again all the newer graphing calculators (the physical ones, not the ones on your phone - though maybe them too) seem to be adding Python support, so they might soon have their own viruses!

But back to the phone, I have a copy of the HP Prime (physical calculator) on mine. The free version has all the features of the Prime except it isn't programmable. Then again, they might not let you use your phone on a college entrance exam. The physical calculator was $150 when I bought it, but you're paying for the hardware there too.