code: def E5():
      def diffeq(t, y):
          dy0 = y[1]
          dy1 = torch.sqrt(1 + y[1] ** 2) / (25 - t)
          return torch.stack([dy0, dy1])
  
      def init():
          return torch.tensor(0.0), torch.tensor([0.0, 0.0])
  
      return diffeq, init, None
  
imports: import math
  import torch
label_desc: Use image node_id 21 for calling a global function with example usage: E5() and returns: diffeq,  init,  None, torch, torch,  torch