Please capitalize where necessary: it is not always straightforward, but it is altogether unforgettable.
A: It is not always straightforward, but it is altogether unforgettable.

Please capitalize where necessary: 810703 cadmium and articles thereof
A: 810703 Cadmium and articles thereof

Please capitalize where necessary: subscribe to the comments for this post?
A: Subscribe to the comments for this post?

Please capitalize where necessary: the onset of mesothelioma is usually quite slow.
A:
The onset of Mesothelioma is usually quite slow.