YES
O(n^2)
TRS:
 {
       minus(minus(x)) -> x,
  +(minus(x), +(x, y)) -> y,
  +(+(x, y), minus(y)) -> x,
        minux(+(x, y)) -> +(minus(y), minus(x))
 }
 Natural interpretation:
  Strict:
   {
         minus(minus(x)) -> x,
    +(minus(x), +(x, y)) -> y,
    +(+(x, y), minus(y)) -> x,
          minux(+(x, y)) -> +(minus(y), minus(x))
   }
  Weak:
   {}
  Interpretation class: deltarestricted
  [minux](delta, X0) = + 1*X0 + 1 + 0*X0*delta + 3*delta
  [+](delta, X1, X0) = + 1*X0 + 1*X1 + 0 + 0*X0*delta + 0*X1*delta + 0*delta
  [minus](delta, X0) = + 1*X0 + 0 + 0*X0*delta + 1*delta
  minux_tau_1(delta) = delta/(1 + 0 * delta)
  +_tau_1(delta) = delta/(1 + 0 * delta)+_tau_2(delta) = delta/(1 + 0 * delta)
  minus_tau_1(delta) = delta/(1 + 0 * delta)
  
  Qed