QUESTION: Fix punctuation: if the foot may say Because I am not a hand I am not of the body it is not because of this not of the body
ANS: if the foot may say, 'Because I am not a hand, I am not of the body;' it is not, because of this, not of the body;

QUESTION: Fix punctuation: Interior product in bodymaterial Aluminium for Surface mounting in White RAL9016 colour IP20 lightsource T5 2x28W ballast type DALI digital addressable lighting interface light source supplied type CRI80 4000K optic type SLSU soflight gives an updown lightdistribution 1090
ANS: Interior product, in bodymaterial Aluminium, for Surface mounting, in White (RAL9016) colour, IP20, lightsource T5, 2x28W, ballast type DALI = digital addressable lighting interface , light source supplied type CRI>80, 4000K, optic type SL/SU = soflight, gives an up/down lightdistribution 10/90.

QUESTION: Fix punctuation: In particular he studied Emdens differential equation
ANS: In particular, he studied Emden's differential equation:

QUESTION: Fix punctuation: His life radiated heavenly joy
ANS:
His life radiated heavenly joy.