i need to use an exponent how do i do that

To use the Exponent, do things like 1E76 or 1E3. Works with stuff like 4E6 and even 932I3E8

There.

Use the key labled "x^y". Example: 2^5. You enter 2 first, then the x^y key, then 5 followed by = sign. That should do it.