The function f is defined by $$\(\mathrm{f}(x)=1-4 x-x^{2}\)$$ for all real values of $$\(x\)$$. Write $$\(\mathrm{f}(x)\)$$ in the form $$\(a-(x+b)^{2}\)$$, where $$\(a\)$$ and $$\(b\)$$ are constants.

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