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

Please capitalize where necessary: 15 "if your brother sins against you, go, show him his fault between you and him alone. if he listens to you, you have gained back your brother.
A: 15 "If your brother sins against you, go, show him his fault between you and him alone. If he listens to you, you have gained back your brother.

Please capitalize where necessary: car hire in and around paris
A: Car Hire in and around Paris

Please capitalize where necessary: new physics phenomena are expected to show up at very high energies. the lhc is called a "discovery-machine", and is built to explore a new energy regime the tev scale and possibly reveal some of the still hidden sides of nature.
A:
New physics phenomena are expected to show up at very high energies. The LHC is called a "discovery-machine", and is built to explore a new energy regime the TeV scale and possibly reveal some of the still hidden sides of Nature.