Hello, I wish to write a function that takes in 3 arguments and outputs 1. I want it to be a saved function so that I can call it at will like cos() or ln() How do i go about doing this? I am unsure of the syntax. Let's say it is really simple like: f(x,y,z)=x+y+z So from the home screen I would like to type f(1,2,3) and have it return 6 Any thoughts? EDIT: okay so maybe that is easier than I thought. The problem I am running into is that you cannot use the "store" key when writing a function. For example if I wanted to write the above like this: f(x,y,z) Func (x+y)->A Return A+z EndFunc I cannot. I have to write: f(x,y,z) Func Return x+y+z EndFunc Also, is there a "shift key" that will make my variables Capital if I need E instead of e ?