YES

1 decompositions
 #1 -----------
   1: -(+(x1,x2)) -> +(-(x1),-(x2))
   2: +(-(x3),-(x4)) -> -(+(x3,x4))

@Rule Labeling
--- R
   1: -(+(x1,x2)) -> +(-(x1),-(x2))
   2: +(-(x3),-(x4)) -> -(+(x3,x4))

--- S
   1: -(+(x1,x2)) -> +(-(x1),-(x2))
   2: +(-(x3),-(x4)) -> -(+(x3,x4))