code: def main():
      x = Symbol("x")
  
      example_limit = Limit(sin(x) / x, x, 0)
      print_gtk(example_limit)
  
      example_integral = Integral(x, (x, 0, 1))
      print_gtk(example_integral)
  
label_desc: Use image node_id 1 for calling a global function with example usage: main() without return types