Hi there, I'm working on a TI-84 plus ce. I did everything you told me and I did enter it all in on Y3, However, I'm still getting an error when I do Y3(0)
That would be symbolic equations within math, and the calculators that can do this are not allowed to be used within programs such as college classes. There are apps that attempt to provide this but not within a good basis of programming. You could build your own program that would allow this to undergo but it would have to be very sophisticated/complex to realize what is being done and to plug in the desired formula/product.