Find the exact value of the given expression. 
Definitions:
EEG Pattern
The characteristic electrical activity of the brain as recorded by an electroencephalogram, used in diagnosing conditions and states of brain function.
REM Sleep
A stage of sleep characterized by rapid eye movements, more dreaming and bodily movement, and faster pulse and breathing.
Electrooculogram
A technique that measures the resting potential of the retina to track eye movements.
Electrooculography
A technique for measuring the corneo-retinal standing potential that exists between the front and the back of the human eye.
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