QUESTION: Fix punctuation: The tangential velocity of the system would be based upon F1 but the computed force based upon the presumption that the atracting masses are concentrated at their center of mass is F2
ANS: The tangential velocity of the system would be based upon F1 but the computed force based upon the presumption that the atracting masses are concentrated at their center of mass is F2.

QUESTION: Fix punctuation: The Russians bought a licence to manufacture their own NZcultivators Vderstad got a decent payment sold parts in unprecedented numbers and the Russians manufactured at least 10 000 cultivators Even today these 1980s cultivators from Vderstad are being used in eg the Baltic countries Russia Belorussia and the Ukraine
ANS: The Russians bought a licence to manufacture their own NZ-cultivators. Vaderstad got a decent payment, sold parts in unprecedented numbers and the Russians manufactured at least 10 000 cultivators. Even today, these 1980s cultivators from Vaderstad are being used in e.g. the Baltic countries, Russia, Belorussia and the Ukraine.

QUESTION: Fix punctuation: The first painting is of Christian V in front of Copenhagen Castle
ANS: The first painting is of Christian V in front of Copenhagen Castle.

QUESTION: Fix punctuation: The business secrets of the present epoch are part of a persistent plot of monopoly capitalism against the interests of society
ANS:
The business secrets of the present epoch are part of a persistent plot of monopoly capitalism against the interests of society.