:salam2:
Every time prayer breaks you have to go and make a new wudu (prayer wash).
Bukhari Volume 1, Book 4, Number 137:
narrated Abu Huraira:
Allah's Apostle said, "The prayer of a person breaks by passing of wind from the anus."
Prophet advised in regard to people laughing at other’s passing wind said: ‘You laugh at that which you yourself do.’”
Bukhari Volume 1, Book 4, Number 139:
Narrated 'Abbas bin Tamim:
My uncle asked Allah's Apostle about a person who imagined to have passed wind from anus during the prayer. Allah' Apostle replied: "He should not leave his prayers unless he hears sound or smells something".

no need to repeat them and. Passing wind is done in two ways i.e. silently and audibly (with a loud annoying sound).