Calling entries in an array of functions?

Hi all,

I am currently writing a Jacobian method function that requires me to call entries of an array of functions.

For example, if my function array is this: F=[x(1)^2-x(2)^2; x(1)^2+x(2)^2];

How do I make F(1) correspond to "x(1)^2-x(2)^2" ?

Basically, if I have an array of functions, how do I associate indices to each function entry, so that something like F(1) can be fed into another function as an input?

Thanks in advance!