Have you ever asked a teacher, "When will I ever use this math equation in real-life?" A sheriff's investigator said he has an eye-opening way to answer.

Discover how Math Notes on iPad Calculator transforms equations with handwriting recognition, real-time computation, and dynamic graphing.

Apple's Calculator app does more than help you calculate tips. With the latest OSes, it launches on iPad and lets you create a Math Note for more complex problems, among other things.