Can you advise of a website or free software application where I can access a scientific calculator the capability to solve a function such as

f(x) = (x^2 -1) / (ln x + x+1 )

where I can enter the function and then enter any variable for x, without having to re-enter the function each time.

I also wish the calculator to be able to create a table of x and f(x) values around a specified x value or limit, and create a graph of the function.