Add spaces: Afterthetestandtrialphases30hullswereproducedbyVEBSchiffswerft,Rechlin,andequippedinWolgast.

Answer: After the test and trial phases 30 hulls were produced by VEB Schiffswerft, Rechlin, and equipped in Wolgast.

Add spaces: "Thecheapesthomeloan"long-termduetotheusuallyverylongtermloan.

Answer: "The cheapest home loan" long-term due to the usually very long term loan.

Add spaces: 1856:Dimitri,hishealthrestoredfromhisstayintheCrimea,returnedtoSaintPetersburgtocompletehisdegreeinchemistry.

Answer:
1856: Dimitri, his health restored from his stay in the Crimea, returned to Saint Petersburg to complete his degree in chemistry.