Please capitalize where necessary: learn more about downloading and managing files on a chrome device.
A: Learn more about downloading and managing files on a Chrome device.

Please capitalize where necessary: as the energy of the quantum harmonic oscillator increases fluctuations in probability density become more dense and hence no matter how short the interval over which they are averaged there will be some energy level at which the average is equal to the classical time-spent probability density function.
A: As the energy of the quantum harmonic oscillator increases fluctuations in probability density become more dense and hence no matter how short the interval over which they are averaged there will be some energy level at which the average is equal to the classical time-spent probability density function.

Please capitalize where necessary: desk research is used to create an overview of the knowledge that already exists on the subject.
A: Desk research is used to create an overview of the knowledge that already exists on the subject.

Please capitalize where necessary: here we change to metro a and get off by the spanish steps.
A:
Here we change to metro A and get off by The Spanish Steps.