Perform the indicated operations with expressions involving fractional exponents and then simplify. 
Definitions:
Rods
The receptor cells in the retina that are sensitive to light but not very useful for color vision.
Color Vision
The ability of the visual system to differentiate various wavelengths of light, enabling us to see colors.
Low Illumination
Refers to conditions of inadequate lighting which can impact visibility, mood, and physiological responses.
Optic Nerve
A paired cranial nerve that transmits visual information from the retina to the brain.
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