Please capitalize where necessary: placing an item in your shopping basket does not guarantee your right to purchase that item.
A: Placing an item in your Shopping basket does not guarantee your right to purchase that item.

Q: first, lets assume you have installed ipsec . how do you know it is working? sure, your connection will not work if it is misconfigured, and it will work when you finally get it right. netstat (1) will list it. but can you independently confirm it?

A: First, lets assume you have installed IPsec . How do you know it is working? Sure, your connection will not work if it is misconfigured, and it will work when you finally get it right. netstat (1) will list it. But can you independently confirm it?

Q: borrar de forma segura archivos - a pedestrian in the network
A: Borrar de forma segura archivos - A pedestrian in the network

Problem: e j cogan, reviewing the book, gives a nice description of combinatory logic:
Can you repeat this sentence, but capitalize it?
Answer: E J Cogan, reviewing the book, gives a nice description of combinatory logic:

Text: used on the table, wall or floor

Correct capitalization: Used on the table, wall or floor

Problem: iran has been the home of a culture which has been influential but not mainstream in the history of world civilization.
Can you repeat this sentence, but capitalize it?
Answer:
Iran has been the home of a culture which has been influential but not mainstream in the history of world civilization.