Perform the indicated operations and simplify the expression. 
Definitions:
Conversion Reaction
A psychological condition where emotional distress or unconscious conflict is expressed through physical symptoms.
Posttraumatic Stress Disorder
A psychiatric disorder that can occur in people who have experienced or witnessed a traumatic event such as a natural disaster, a serious accident, a terrorist act, war/combat, rape, or other violent personal assault.
Opponent-Process Reaction
A theory suggesting that emotions are regulated by mechanisms that operate in opposing pairs; for example, an increase in happiness leads to a decrease in sadness.
General Adaptation Syndrome
describes the three-stage process (alarm, resistance, exhaustion) that the body undergoes while responding to stress, as identified by Hans Selye.
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