we house more than 500 connectivity providers and internet service providers and 20 european internet exchanges.

How would the previous sentence be correctly capitalized?
Answer: We house more than 500 connectivity providers and Internet service providers and 20 European Internet exchanges.
program modification: sometimes, not only virus worm:win32/bagle.aag or malware registry easy but also common softwares possessing the ability to modify the inner functions of dswave.dll, which means other programs can't find this dll file again.

How would the previous sentence be correctly capitalized?
Answer: Program Modification: Sometimes, not only virus Worm:Win32/Bagle.AAG or malware Registry Easy but also common softwares possessing the ability to modify the inner functions of dswave.dll, which means other programs can't find this DLL file again.
if you fail to catch the flower, you will miss one life.

How would the previous sentence be correctly capitalized?
Answer: If you fail to catch the flower, you will miss one life.
for tax rates and risk premiums

How would the previous sentence be correctly capitalized?
Answer: for Tax Rates and Risk Premiums