Please capitalize where necessary: traces of age and use. total length 45 cm. blade 30 cm.
A: Traces of age and use. Total length 45 cm. Blade 30 cm.

Q: messages where teachers can post messages for the course participants in the group.

A: Messages where teachers can post messages for the course participants in the group.

Q: as katies hairstylist it will be your job to mix and match the nuances of each of her locks and create a sparkling mash-up of colors that will impress everyone at katies school!
A: As Katies hairstylist it will be your job to mix and match the nuances of each of her locks and create a sparkling mash-up of colors that will impress everyone at Katies school!

Problem: for 90 years, it has been clear that niacin is important to the nervous system and that severe niacin deficiency can cause dementia - as part of the deficiency disease pellagra.
Can you repeat this sentence, but capitalize it?
Answer: For 90 years, it has been clear that niacin is important to the nervous system and that severe niacin deficiency can cause dementia - as part of the deficiency disease pellagra.

Text: what are the top priorities in the deregulation of european markets and how can european public procurement rules be streamlined and simplified?

Correct capitalization: What are the top priorities in the deregulation of European markets and how can European public procurement rules be streamlined and simplified?

Text: the customer who applies for credit should be required to produce proof of his ability to settle within an agreed period the amount he owes.

Correct capitalization:
The customer who applies for credit should be required to produce proof of his ability to settle within an agreed period the amount he owes.