Please capitalize where necessary: vouchers are valid for one calendar year from the date of issue, after which they expire.
A: Vouchers are valid for one calendar year from the date of issue, after which they expire.

Q: the results of the tests in the project "continued development and test of teredostop" substantiate the innovative and promising perspectives of teredostop which combines the solution (ts) and the method of impregnation. after further product development teredostop will have the potential to become an environmentally friendly alternative to the existing preservatives against borers in maritime woodwork.

A: The results of the tests in the project "Continued development and test of TeredoStop" substantiate the innovative and promising perspectives of TeredoStop which combines the solution (TS) and the method of impregnation. After further product development TeredoStop will have the potential to become an environmentally friendly alternative to the existing preservatives against borers in maritime woodwork.

Q: interestingly, studies have not found an increased risk of osteoarthritis in long-distance runners.
A: Interestingly, studies have not found an increased risk of osteoarthritis in long-distance runners.

Problem: all media to mp3 converter
Can you repeat this sentence, but capitalize it?
Answer: All Media To Mp3 Converter

Text: economy: the dominance of the tertiary sector

Correct capitalization: Economy: the dominance of the tertiary sector

Problem: he then returned to work on analysis, in particular studying differential equations arising from hydrodynamics.
Can you repeat this sentence, but capitalize it?
Answer:
He then returned to work on analysis, in particular studying differential equations arising from hydrodynamics.