<s>[INST] Brutus wrote a table of values for the function \(f(x)=x^{2}-4\) and then he sealed it in an envelope.  Cassius guessed that the function was \(f(x)=x^{2}-2\).  Brutus told  Cassius that he had made an error, but that Cassius's guess was only off by  2 units in the range.  Now it is your turn to guess.  What is \(f(x)=\)?[/INST]