Problem: Add spaces: In1941however,hejoinedNavalIntelligenceandwasinvolved,asweremanyothermathematicians,decipheringcodedmessages.

Spaces added: In 1941 however, he joined Naval Intelligence and was involved, as were many other mathematicians, deciphering coded messages.

Problem: Add spaces: CananalyzebatchesofMacintoshfilessignaturesinselectedfolders.

Spaces added: Can analyze batches of Macintosh files signatures in selected folders.

Problem: Add spaces: Whathastohappenisthatcellsdevelopinwhichthereisrisingairaroundthecenterandfallingairaroundtheperiphery.

Spaces added: What has to happen is that cells develop in which there is rising air around the center and falling air around the periphery.

Problem: Add spaces: Anozzle,whichisconnectedtoavacuumsuction,istheniiuterus.

Spaces added:
A nozzle, which is connected to a vacuum suction, is then ii uterus.