remove sin with Mantras and cows

if we do 16 Pranayamas along with Mantras, the sins committed vanish.

taking care of cows are normal redemptive acts for all sins.

calling rama name shiva name

Sri Rudra Mantra - Om namo bhagavathe rudraya - 

https://brahminrituals.blogspot.com/2010/02/prayaschitha-dharma-prakarana.html