Please capitalize where necessary: before you can open a dax file, you'll need to figure out what kind of file the dax file extension refers to.
A: Before you can open a DAX file, you'll need to figure out what kind of file the DAX file extension refers to.

Please capitalize where necessary: verdi gracia v can be reserved only if the booking start date is between 16 jun 2015 - 01 jul 2015
A: Verdi Gracia V can be reserved only if the booking start date is between 16 Jun 2015 - 01 Jul 2015

Please capitalize where necessary: he translated descartes ' geometrie into german and this was published by mayer and muller, berlin, in 1894.
A: He translated Descartes ' Geometrie into German and this was published by Mayer and Muller, Berlin, in 1894.

Please capitalize where necessary: filing cabinets, 80 to 120 cm wide. serie 800
A:
Filing cabinets, 80 to 120 cm wide. Serie 800