text: #!/usr/bin/env python
  import numpy as np
  
  def calculate_feroments(c: np.array, _w: float, _u: float,
  		w: np.array, u: np.array) -> np.array:
  	f = np.log(c + 1) * (u / w) * (_u / _w)
  	return np.array(f, dtype='float64')
  