code: def A5():
      diffeq = lambda t, y: (y - t) / (y + t)
      init = lambda: (torch.tensor(0.0), torch.tensor(4.0))
      return diffeq, init, None
  
imports: import math
  import torch
label_desc: Use image node_id 5 for calling a global function with example usage: A5() and returns: diffeq,  init,  None