text: from tayloralgebra import ExponentialFunction, LogarithmFunction, LogGammaFunction, SineFunction, CosineFunction, PowerFunction
  
  x = PowerFunction(1)
  exp = ExponentialFunction()
  log = LogarithmFunction()
  sin = SineFunction()
  cos = CosineFunction()
  log_gamma = LogGammaFunction()
  gamma = exp(log_gamma)