Be sure students put cell phones away on exams

I got this email message. it is self-explanatory.

There is now an application for iPhones called SpaceTime Mathematics which does symbolic calculus.

The ad says:

"Solve limits, derivatives and integrals with MobileCAS, the first computer algebra system ever developed for iPhone that includes over 200 functions.

Graph 2D function, parametric, polar, vector field, implicit and contour plots. Move, pinch and trace 2D graphs in real-time!

Graph 3D function, parametric, spherical, and cylindrical plots. Rotate, pinch and move 3D graphs in real-time!"

If that isn't enough, you can also animate graphs.

Better be sure the students put their cell phones away on exams.