Enter a function
By default all symbols in above 'Function' are assumed as variables.
Here you can specify a list of variable(s) of the function,
then all other remaining symbols will be assumed as constants.
Enter numerical value(s) and error(s) for listed 'Variables' to evaluate.
Input format: "x, xErr" OR "[x, xErr], [y, yErr], [z, zErr]..."
Enter [Value, Error] pair for each of the variables in the same order as
they appear in the 'Variables' field above.