QUESTION: Fix punctuation: Galton gave to the problem of extinction of families a precise mathematical formulation and communicated it in 1873 to the Educational Times
ANS: Galton ... gave to the problem [of extinction of families] a precise mathematical formulation, and communicated it in 1873 to ... the Educational Times. ...

QUESTION: Fix punctuation: As Mo notes the significance here is that all earlier attempts to calculate were based on practical measurement whereas the work by Zhang was based on a theoretical calculation
ANS: As Mo notes, the significance here is that all earlier attempts to calculate were based on practical measurement, whereas the work by Zhang was based on a theoretical calculation.

QUESTION: Fix punctuation: Similar games to M and ms game
ANS: Similar games to M and m's game

QUESTION: Fix punctuation: 2 pot holders 50 g off white and 150 g colour
ANS:
2 pot holders = 50 g off white and 150 g colour.