Please capitalize where necessary: 13 then david went over to the other side, and stood on the top of an hill afar off; a great space being between them:
A: 13 Then David went over to the other side, and stood on the top of an hill afar off; a great space being between them:
Q: please note, however, that falling trends often last for a long time, and disappointment is often followed by more disappointment.

A: Please note, however, that falling trends often last for a long time, and disappointment is often followed by more disappointment.
Q: unsure about which type of sa7 file you have? do you want to know exactly what it is, who created it, and how to open it?
A: Unsure about which type of SA7 file you have? Do you want to know exactly what it is, who created it, and how to open it?
Problem: most of his working life has been spent at large corporations including volvo where, when he left the company in early 1994, he was director of finance.
Can you repeat this sentence, but capitalize it?
Answer: Most of his working life has been spent at large corporations including Volvo where, when he left the company in early 1994, he was Director of Finance.
Text: stronger and harder erections.

Correct capitalization: Stronger and harder erections.
Problem: these have interesting geometrical properties and edge investigated them in a series of papers spanning 40 years.
Can you repeat this sentence, but capitalize it?
Answer:
These have interesting geometrical properties and Edge investigated them in a series of papers spanning 40 years.