Add punctuation: At that time backlight was invented it was a pleasure to enjoy the world in its pouring rays The photographers eschewed the quotidian and the mundane and optimistically spread positive messages
A: At that time backlight was invented: it was a pleasure to enjoy the world in its pouring rays. The photographers eschewed the quotidian and the mundane and optimistically spread positive messages.

Add punctuation: It will help bring together the infrastructure project promoters in order to help tackle any technical planning design and implementation issues and facilitate their contacts with the European Investment Bank and other banks
A: It will help bring together the infrastructure project promoters in order to help tackle any technical, planning, design and implementation issues and facilitate their contacts with the European Investment Bank and other banks.

Add punctuation: You will learn here is very practical and cheerful in a team appoints Reinhold Gruber Mechanical engineer and trainer the strengths of his yacht school Whoever brings much enthusiasm and inquisitiveness is rewarded by a practical training and extensive support
A:
You will learn here is very practical and cheerful in a team ", appoints Reinhold Gruber, Mechanical engineer and trainer, the strengths of his yacht school. Whoever brings much enthusiasm and inquisitiveness, is rewarded by a practical training and extensive support.