Add punctuation: Next step was to find elements and fragments to be used in a small model
A: Next step was to find elements and fragments to be used in a small model.

Add punctuation: Within the week President Nasser of Egypt nationalized the Suez Canal and at once the air was filled with wartalk as in 19523 during the episode of the Jewish doctors
A: Within the week President Nasser of Egypt nationalized the Suez Canal and at once the air was filled with war-talk, as in 1952-3 during the episode of "the Jewish doctors".

Add punctuation: 27 Therefore son of man speak unto the house of Israel  and say unto them Thus saith the Lord GOD Yet in this your fathers have blasphemed me in that they have committed a trespass against me
A:
27 Therefore, son of man, speak unto the house of Israel , and say unto them, Thus saith the Lord GOD; Yet in this your fathers have blasphemed me, in that they have committed a trespass against me.