For example if we have x=953, I want to select specifically the first digit (or the last two) and save it in another variable, so the outcome would be y=9 (or y=53)
Hydroquinone has also been linked to a medical condition in humans called ochronosis. This condition has actually been found in humans, not rodents, but the evidence is inconclusive at the moment. Ochronosis is a condition where the affected skin darkens in color, and also becomes thicker in texture.
Skin lightening creams with at least 2 percent Hydroquinone such as Esoterica or Porcelana are your best bet and should be applied to your brown spots twice daily. You can buy these at Sephora or pharmacies. Just look for Hydroquinone on the package.