YES

Problem:
 -(-(neg(x),neg(x)),-(neg(y),neg(y))) -> -(-(x,y),-(x,y))

Proof:
 Matrix Interpretation Processor: dim=1
  
  interpretation:
   [-](x0, x1) = x0 + 4x1,
   
   [neg](x0) = x0 + 1
  orientation:
   -(-(neg(x),neg(x)),-(neg(y),neg(y))) = 5x + 20y + 25 >= 5x + 20y = -(-(x,y),-(x,y))
  problem:
   
  Qed