What is the sum of matrix M and its negative? 
Definitions:
Morgue
A place where bodies are kept, especially for identification or autopsy, before burial or cremation.
Corpses
The bodies of deceased individuals.
Sexual Masochism Disorder
A psychological condition wherein individuals derive sexual pleasure and satisfaction from experiencing pain or humiliation.
Humiliated
The feeling of embarrassment or shame as a result of being made to look foolish or incompetent.
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