ching係咪如果find symbolic expression(by union, intersection,complement, symmetric difference)用上面個expression啱唔啱我啱啱嗰個應該啱 我指我更正咗嗰個thx ching 冇學過 \ 呢個symbol所以諗左好耐
ching係咪如果find symbolic expression(by union, intersection,complement, symmetric difference)用上面個expression啱唔啱我啱啱嗰個應該啱 我指我更正咗嗰個
ching係咪如果find symbolic expression(by union, intersection,complement, symmetric difference)用上面個expression啱唔啱