YES
(ignored inputs)COMMENT from the collection of \cite{AT2012}
Rewrite Rules:
   [ -(+(?x,?y)) -> +(-(?x),-(?y)),
     +(?x,?y) -> +(?y,?x) ]
Apply Direct Methods...
Inner CPs:
   [ -(+(?y_1,?x_1)) = +(-(?x_1),-(?y_1)) ]
Outer CPs:
   [  ]
not Overlay, check Termination...
unknown/not Terminating
unknown Knuth & Bendix
Linear
unknown Development Closed
Strongly Closed
Direct Methods: CR

Final result: CR
149.trs: Success(CR)
(0 msec.)