Evaluate: [math] \sqrt{1-\sqrt{2+\sqrt{3-\sqrt{4+\sqrt{5-...\sqrt{n}}}}}} [/math]? [math]N = \sqrt{\sqrt{5} + 2} + \frac{\sqrt{\sqrt{5} - 2}}{\sqrt{\sqrt{5} + 1}} - \sqrt{3 - 2 \sqrt{2}}[/math], what is N?