This App, by I.Q. Joe, the creators of Zoom Math, provides an easy-to-use interface so you can enter the math problem the same way you see it in your textbook, thereby reinforcing math notation and students' understanding.
Visualize and work with correct math notation for fractions, radicals, exponents and math symbols like π.
Entering and viewing math problems in correct math notation gives students the visual feedback they need to verify that they have entered the problem correctly into the calculator, to help ensure the right answer.
Students can also grab and edit previous inputs, saving time and typos!
Download Zoom Math's App4Math software and documentation or check for updates at: | 
App4Math App for the TI-83 Plus and TI-84 Plus
Download Instructions