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

Final result: CR
177.trs: Success(CR)
(32 msec.)