code: def calculate_series(e, x, logx=None):
      """Calculates at least one term of the series of ``e`` in ``x``.
  
      This is a place that fails most often, so it is in its own function.
      """
  
      SymPyDeprecationWarning(
          feature="calculate_series",
          useinstead="series() with suitable n, or as_leading_term",
          issue=21838,
          deprecated_since_version="1.12",
      ).warn()
  
      from sympy.simplify.powsimp import powdenest
  
      for t in e.lseries(x, logx=logx):
          # bottom_up function is required for a specific case - when e is
          # -exp(p/(p + 1)) + exp(-p**2/(p + 1) + p)
          t = bottom_up(t, lambda w: getattr(w, "normal", lambda: w)())
          # And the expression
          # `(-sin(1/x) + sin((x + exp(x))*exp(-x)/x))*exp(x)`
          # from the first test of test_gruntz_eval_special needs to
          # be expanded. But other forms need to be have at least
          # factor_terms applied. `factor` accomplishes both and is
          # faster than using `factor_terms` for the gruntz suite. It
          # does not appear that use of `cancel` is necessary.
          # t = cancel(t, expand=False)
          t = t.factor()
  
          if t.has(exp) and t.has(log):
              t = powdenest(t)
  
          if not t.is_zero:
              break
  
      return t
  
imports: from functools import reduce
  from sympy.core import Basic, S, Mul, PoleError, expand_mul
  from sympy.core.cache import cacheit
  from sympy.core.intfunc import ilcm
  from sympy.core.numbers import I, oo
  from sympy.core.symbol import Dummy, Wild
  from sympy.core.traversal import bottom_up
  from sympy.functions import log, exp, sign
  from sympy.series.order import Order
  from sympy.utilities.exceptions import SymPyDeprecationWarning
  from sympy.utilities.misc import debug_decorator
  from sympy.utilities.timeutils import timethis
label_desc: Use image node_id 9 for calling a global function with example usage: calculate_series(e, x, logx) and returns: t