code: def test_gosper_sum_parametric():
      assert gosper_sum(
          binomial(S.Half, m - j + 1) * binomial(S.Half, m + j),
          (j, 1, n),
      ) == n * (1 + m - n) * (-1 + 2 * m + 2 * n) * binomial(
          S.Half, 1 + m - n
      ) * binomial(
          S.Half, m + n
      ) / (
          m * (1 + 2 * m)
      )
  
imports: from sympy.core.numbers import Rational, pi
  from sympy.core.singleton import S
  from sympy.core.symbol import Symbol
  from sympy.functions.combinatorial.factorials import binomial, factorial
  from sympy.functions.elementary.exponential import exp, log
  from sympy.functions.elementary.miscellaneous import sqrt
  from sympy.functions.special.gamma_functions import gamma
  from sympy.polys.polytools import Poly
  from sympy.simplify.simplify import simplify
  from sympy.concrete.gosper import gosper_normal, gosper_sum, gosper_term
  from sympy.abc import a, b, j, k, m, n, r, x
label_desc: Use image node_id 5 for calling a global function with example usage: test_gosper_sum_parametric() without return types