In trapezoid RSTV , 
. If m 
, m 
, m 
, and m 
, find the value of the expression 
.
Definitions:
Rumelhart
Rumelhart is best known for his work in cognitive psychology and artificial intelligence, particularly in the development of the parallel distributed processing framework.
Ortony
Andrew Ortony is a cognitive scientist known for his work in the areas of emotions and cognitive psychology.
Schemata
Cognitive structures that represent organized knowledge about a given concept or type of stimulus, based on past experience.
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