Add spaces: Theonlythingwecandoistoexpandthecircleofthosewhoknow,bypassingonthesuppressedknowledgetotheminorityofpeoplewhoareableandwillingtothinkforthemselves.

Answer: The only thing we can do is to expand the circle of those who know, by passing on the suppressed knowledge to the minority of people who are able and willing to think for themselves.

Add spaces: Recordingtimeuptomin.

Answer: Recording time up to min.

Add spaces: Theconcretefloorsuperimposesthegalleryfloortemporarilyasanextralayerofmeaninginaphysicalsense.

Answer:
The concrete floor superimposes the gallery floortemporarilyas an extra layer of meaning in a physical sense.