YES(?,O(n^2))
TRS:
 {
  minus f(x, y) -> f(minus y, minus x),
      minus h x -> h minus x,
  minus minus x -> x
 }
 DUP: We consider a non-duplicating system.
  Trs:
   {
    minus f(x, y) -> f(minus y, minus x),
        minus h x -> h minus x,
    minus minus x -> x
   }
  Matrix Interpretation:
   Interpretation class: triangular
           [X1]    [1 2][X1]   [1]
   [minus]([X0]) = [0 1][X0] + [0]
   
       [X1]    [1 0][X1]   [0]
   [h]([X0]) = [0 1][X0] + [2]
   
       [X3]  [X1]    [1 0][X3]   [1 0][X1]   [3]
   [f]([X2], [X0]) = [0 1][X2] + [0 1][X0] + [3]
   
   
   Qed