He has repented from a relationship with a woman over the internet

Is Sujud At-Tilawah Allowed at Times Prayer is Forbidden?

He took some money by force from a man and he wants to repent

She committed a haraam action with a man thinking that she was helping him and being kind

He hugged his sister when they were both naked

His friends have some pictures of him and he has asked them to destroy them, but they refused

He has recently started to pray regularly

A woman attempted to kill herself but she repented before she died

He repents then he goes back to sin

How can someone who used to commit adultery and steal repent?