{\scriptsize
F = \begin{cases}
	y_1 &= {x_1}^2+x_4x_1+x_5x_1+x_2x_4+x_5x_4+x_2x_5+x_4x_3+{x_3}^2+x_3x_2\\
	y_2 &= x_2x_5+x_1x_2+x_5x_1+{x_4}^2+x_3x_2\\
	y_3 &= x_1x_3+x_4x_3+{x_5}^2+x_4x_1+x_5x_1+x_1x_2+{x_4}^2+{x_3}^2\\
	y_4 &= {x_4}^2+x_5x_4+{x_5}^2+x_5x_3+{x_2}^2+x_5x_1+{x_3}^2+x_3x_2\\
        y_5 &= {x_5}^2+x_5x_1+{x_4}^2+x_4x_3+x_2x_5+x_1x_3
\end{cases}
}
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