Please capitalize where necessary: all users should upgrade as soon as possible.
A: All users should upgrade as soon as possible.

Q: this explains the number of planets perfectly: there are only five convex regular solids (as is proved in euclid 's elements , book 13).

A: This explains the number of planets perfectly: there are only five convex regular solids (as is proved in Euclid 's Elements , Book 13).

Q: german, old and young (18+)
A: German, old and young (18+)

Problem: for one woman, they can disturb her daily functioning greatly, but for another, they may hardly be bothersome.
Can you repeat this sentence, but capitalize it?
Answer: For one woman, they can disturb her daily functioning greatly, but for another, they may hardly be bothersome.

Text: together with henry whitehead and christopher zeeman he published imbedding of manifolds in euclidean space in 1961.

Correct capitalization: Together with Henry Whitehead and Christopher Zeeman he published Imbedding of manifolds in euclidean space in 1961.

Q: and this is just metrotown.

A:
And this is just Metrotown.