code: def _helper1(self, a):
      # this tests ufuncs involving simple arithmetic
      a = a + 3
      a = a * 7.6
      return a**2
  
imports: import pytest
  import cupy
  from cupy import cuda
  from cupy import testing
  import cupyx
label_desc: Use image node_id 1 for calling the TestGraph obj's underlying member method code with example usage: obj._helper1(a) and returns: unknown