YES

1 decompositions
 #0 -----------
   1: -(+(x,y)) -> +(-(x),-(y))
   2: +(-(x),-(y)) -> -(+(x,y))

@Strongly Commuting
--- R
   1: -(+(x,y)) -> +(-(x),-(y))
   2: +(-(x),-(y)) -> -(+(x,y))

--- S
   1: -(+(x,y)) -> +(-(x),-(y))
   2: +(-(x),-(y)) -> -(+(x,y))