Please capitalize where necessary: one good illustration would be playing in a plo game with $100 buy-in money.
A: One good illustration would be playing in a PLO game with $100 buy-in money.

Q: we proudly offer best price guarantee to our dyed pearl strand necklace.this dyed pearl strand necklace is offered at the lowest price on the market with premium quality.now it's best chance to make the discount pearl necklace deals with bjbead.com.

A: We proudly offer BEST price guarantee to our dyed pearl strand necklace.This dyed pearl strand necklace is offered at the LOWEST price on the market with premium quality.NOW it's best chance to make the discount pearl necklace deals with Bjbead.com.

Q: if you decide to leave plixi social dating because you have found someone or just want to have a break you can delete your profile by going to profile >> account details and click on the remove account button. we would really appreciate your feedback on why you are leaving to help us improve our service.
A: If you decide to leave Plixi Social Dating because you have found someone or just want to have a break you can delete your profile by going to Profile >> Account details and click on the Remove account button. We would really appreciate your feedback on why you are leaving to help us improve our service.

Problem: each eu country is unique.
Can you repeat this sentence, but capitalize it?
Answer: Each EU country is unique.

Text: the instructions are very clear and you don't need experience or anything to do it correctly.

Correct capitalization: The instructions are very clear and you don't need experience or anything to do it correctly.

Problem: department of management of foreign economic activity
Can you repeat this sentence, but capitalize it?
Answer:
Department of management of foreign economic activity