Text: the only time casino profits current driving down side casino games in colorado was approved in 1991.

Correct capitalization: The only time casino profits current driving down side casino games in Colorado was approved in 1991.

Text: in a study, japanese scientists have established that vitamin b2 counteracts inflammation and increases the body's resistance.

Correct capitalization: In a study, Japanese scientists have established that vitamin B2 counteracts inflammation and increases the body's resistance.

Text: civil war is a process wherein political tasks are solved by military means.

Correct capitalization: Civil war is a process wherein political tasks are solved by military means.

Text: apparently he eventually became unable to undertake work which required him to concentrate, and research in mathematics became impossible at these times.

Correct capitalization:
Apparently he eventually became unable to undertake work which required him to concentrate, and research in mathematics became impossible at these times.