class_docstr: Logarithm of the sum of exponentiations of the inputs.
  
  Helper class for use with e.g. numpy.logaddexp
  
  See Also
  ========
  
  https://numpy.org/doc/stable/reference/generated/numpy.logaddexp.html
code: def __new__(cls, *args):
      return Function.__new__(cls, *sorted(args, key=default_sort_key))
  
imports: from sympy.core.function import Add, ArgumentIndexError, Function
  from sympy.core.power import Pow
  from sympy.core.singleton import S
  from sympy.core.sorting import default_sort_key
  from sympy.functions.elementary.exponential import exp, log
label_desc: Use image node_id 1 for calling the logaddexp obj's underlying member method code with example usage: obj.__new__(cls) and returns: Function