QUES: In matters of culture haste and sweeping measures are most harmful

correct the punctuation.

CORRECTED: In matters of culture, haste and sweeping measures are most harmful.

QUES: This description is meant for people who are looking for the proper list to join so make sure its clear and informative

correct the punctuation.

CORRECTED: This description is meant for people who are looking for the proper list to join, so make sure it's clear and informative.

QUES: After receiving his doctorate Lehmer was awarded a National Research Fellowship and with this he spent 193031 at the California Institute of Technology and then 193132 at Stanford

correct the punctuation.

CORRECTED:
After receiving his doctorate, Lehmer was awarded a National Research Fellowship and with this he spent 1930-31 at the California Institute of Technology and then 1931-32 at Stanford.