What is the ruling on frequent flatulence and the emission of gas that causes some impurities to come out onto clothing, and how can these impurities be removed daily, especially when praying in public places?

Avoiding impurities is a condition for the validity of prayer when one knows about them and is able to remove them. If you know there is an impurity on your body or clothes, you must remove it.

If you are in a place where purification is difficult and you fear the prayer time will expire, then pray according to your situation, because this condition is waived due to inability.

For Malikis, impurities on the body and clothes are excused for one who is afflicted by continuous ritual impurity.

If you doubt whether an impurity has exited, the original presumption is that it has not. As for gases, ablution is required for them unless they reach the point of continuous discharge (sals).