Please capitalize where necessary: in this context, it is difficult to determine what happened and will happen and how it will look in a few or several years .
A: In this context, it is difficult to determine what happened and will happen and how it will look in a few or several years .

Please capitalize where necessary: check without artificial colours and aroma, without taurin
A: check Without artificial colours and aroma, without taurin

Please capitalize where necessary: in the time reversal picture there does not seems to be any reason for one of the incident photons continuing on its way and the other being absorbed.
A: In the time reversal picture there does not seems to be any reason for one of the incident photons continuing on its way and the other being absorbed.

Please capitalize where necessary: after buying the software you need not go through all the steps.
A:
After buying the software you need not go through all the steps.