Question

$- 4 + \frac{3}{7} + (2 + \ \frac{9}{14} ) + (- 3 \ \frac{2}{7} ) + ( + 3 \ \frac{3}{14} ) + ( - 5 \ \frac{2}{7} ) + ( + 1 \times \frac{1}{14} ) =$
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