\left\{ \begin{array} { l } { y = - x ^ { 2 } + 1 } \\ { x y = - 5 } \end{array} \right.
Solve for y, x
x = \frac{18 ^ {\frac{2}{3}} {(\sqrt[3]{\sqrt{2013} + 45} + \sqrt[3]{45 - \sqrt{2013}})}}{18} \approx 1.904160859
y=\frac{\sqrt[3]{18}\left(-\left(\sqrt{2013}+45\right)^{\frac{2}{3}}-\left(45-\sqrt{2013}\right)^{\frac{2}{3}}+18^{\frac{2}{3}}-2\sqrt[3]{12}\right)}{18}\approx -2.625828577
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