Add punctuation: Just as the premature death is a result of causes which have previously been set in motion and therefore must take place so the situation of being motherless is a result of causes previously set in motion
A: Just as the premature death is a result of causes which have previously been set in motion and therefore must take place, so the situation of being "motherless" is a result of causes previously set in motion.

Add punctuation: Potassium is one of the salts that together with sodium is lost via the stools
A: Potassium is one of the salts that together with sodium is lost via the stools.

Add punctuation: Despite the sharp deterioration in the socioeconomic landscape between 2007 and 2009 the report indicates a strong commitment to the implementation of the programme aims established at the outset
A:
Despite the sharp deterioration in the socio-economic landscape between 2007 and 2009, the report indicates a strong commitment to the implementation of the programme aims established at the outset.