Please capitalize where necessary: linux/unix comprehensive knowledge of the freeware, linux functions and development possibilities.
A: Linux/Unix Comprehensive knowledge of the freeware, Linux functions and development possibilities.
Q: convenient cutting of nym cables up to 5 x 2.5 mm²

A: convenient cutting of NYM cables up to 5 x 2.5 mm²
Q: hamilton american classic valiant automatic h39515753 men's watch
A: Hamilton American Classic Valiant Automatic H39515753 Men's Watch
Problem: the consultants' competence is based on both theoretical and practical experience.
Can you repeat this sentence, but capitalize it?
Answer: The consultants' competence is based on both theoretical and practical experience.
Text: unlike chianti, chianti classico identifies the exact, original places where the internationally renowned grape variety was (and still is) produced, extending through florence, siena and the relative provinces.

Correct capitalization: Unlike Chianti, Chianti Classico identifies the exact, original places where the internationally renowned grape variety was (and still is) produced, extending through Florence, Siena and the relative provinces.
Text: makes it easy to play your wav, mp3, midi and cd tracks.

Correct capitalization:
Makes it easy to play your WAV, MP3, Midi and CD Tracks.