code: def forward(self, x):
      return (
          0.5
          * x
          * (
              1
              + torch.tanh(
                  math.sqrt(2 / math.pi)
                  * (x + 0.044715 * torch.pow(x, 3))
              )
          )
      )
  
imports: import torch
  from torch import nn
  import torch.nn.functional
  import math
  from inspect import isfunction
label_desc: Use image node_id 1 for calling the GELU_ obj's underlying member method code with example usage: obj.forward(x) and returns: unknown