$$Â 4 + \frac{1}{6} \times $$ [ { $$Â - 12 \times ( 24 - 13 - 3) $$ } $$Â \div ( 20 - 4) $$ ] = ?
$$Â 4 + \frac{1}{6} \times $$ [ { $$Â - 12 \times ( 24 - 13 - 3) $$ } $$Â \div ( 20 - 4) $$ ]Â
=$$Â 4 + \frac{1}{6} \times $$ [ { $$Â - 12 \times 8 $$ } $$Â \div 16 $$ ]Â
=$$ 4 + \frac{1}{6} \times -6$$
=4-1
=3Â
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