Please capitalize where necessary: he has trained people from over 30 different countries and has worked with organizations from a variety of industries.
A: He has trained people from over 30 different countries and has worked with organizations from a variety of industries.

Please capitalize where necessary: course formula 1 (formula d)
A: Course Formula 1 (Formula D)

Please capitalize where necessary: to select and control quickly all processes, mma, tig and mig/mag.
A: to select and control quickly all processes, MMA, TIG and MIG/MAG.

Please capitalize where necessary: you probably already know that virtually all other online services charge between 10%-30%. so, even if you use multiple reservation services, your profit margin increases for every reservation you receive from pragueinstantbooking.com.
A:
You probably already know that virtually all other online services charge between 10%-30%. So, even if you use multiple reservation services, your profit margin increases for every reservation you receive from PragueInstantBooking.com.