Please capitalize where necessary: let (n) be the number of primes less than x and let
A: Let (n) be the number of primes less than x and let

Q: i got a reply stating if i bought two phones i will get a discount.

A: I got a reply stating if I bought two phones I will get a discount.

Q: after a while he gets enough and holds the boat out on a small promontory.
A: After a while he gets enough and holds the boat out on a small promontory.

Problem: using outdated or corrupt asus laptop drivers can cause system errors, crashes, and cause your computer or hardware to fail. furthermore, installing the wrong asus drivers can make these problems even worse.
Can you repeat this sentence, but capitalize it?
Answer: Using outdated or corrupt ASUS Laptop drivers can cause system errors, crashes, and cause your computer or hardware to fail. Furthermore, installing the wrong ASUS drivers can make these problems even worse.

Text: 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?

Correct capitalization: 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?

Text: it is there, where the slope goes up against rogvun.

Correct capitalization:
It is there, where the slope goes up against Rogvun.