one of the advantages with lithium is there long storage time, they can be stored for 10 years.

How would the previous sentence be correctly capitalized?
Answer: One of the advantages with Lithium is there long storage time, they can be stored for 10 years.
his 1948 papers are on somewhat different topics, being on topological spaces and linkages.

How would the previous sentence be correctly capitalized?
Answer: His 1948 papers are on somewhat different topics, being on topological spaces and linkages.
these letters clearly did not express the love that mary hoped to find in them and when stokes wrote her a 55 page letter (which was possibly deliberately destroyed) about the duty he felt towards her, she came close to calling off the wedding at the last moment.

How would the previous sentence be correctly capitalized?
Answer: These letters clearly did not express the love that Mary hoped to find in them and when Stokes wrote her a 55 page letter (which was possibly deliberately destroyed) about the duty he felt towards her, she came close to calling off the wedding at the last moment.
the exercise is to mix raw materials to a desired chemical composition.

How would the previous sentence be correctly capitalized?
Answer: The exercise is to mix raw materials to a desired chemical composition.