QUESTION: Fix punctuation: For example as far back as 1990 Gruvn completely stopped the use of chlorine gas for bleaching
ANS: For example, as far back as 1990 Gruvon completely stopped the use of chlorine gas for bleaching.

QUESTION: Fix punctuation: Competition entries may be published during marketing
ANS: Competition entries may be published during marketing;

QUESTION: Fix punctuation: As this Something is outside time and space it has only one single analysis namely this that is constitutes Something which is
ANS: As this 'Something' is outside time and space, it has only one single analysis, namely this: that is constitutes 'Something which is'.

QUESTION: Fix punctuation: Your first father sinned and your teachers have transgressed against me
ANS:
Your first father sinned, and your teachers have transgressed against me.