MAYBE
Time: 0.008

Problem:
 Equations:
  
 TRS:
  plusAC(x,0()) -> x
  plusAC(x,s(y)) -> s(plusAC(x,y))
  timesAC(x,0()) -> 0()
  timesAC(x,s(y)) -> plusAC(timesAC(x,y),x)
  minus(x,0()) -> x
  minus(s(x),s(y)) -> minus(x,y)
  div(0(),s(y)) -> 0()
  div(s(x),s(y)) -> s(div(minus(x,y),s(y)))

Proof:
 Open