If you're taking math or science courses, you'll most likely only be allowed to use a handheld calculator on exams.When you're on your own, you're better off using something like Python. Python's ...

The newest Texas Instruments graphing calculator brings the popular Python programming language to the classroom.(Hand-out / Texas Instruments) Dallas-based Texas Instruments’ latest generation ...

Also, in this example I used Python in trinket.io because it shows the output window alongside the code window and that works very well for a calculator. Of course, you could use glowscript.org or ...

For more information and full specifications jump over to the Adafruit online store where the NumWorks Graphing Calculator integrated Python interpreter is now available to purchase priced at $124.95.