old_contents: # coding: utf-8
  
  def f(u,v):
      t = u - v
      return t
  
  def g(x,v):
      m = x - v
      t =  2.0 * m
      z =  2.0 * t
      return t, z
  
  x = 1.0
  y = 2.0
  
  w    = 2 * f(x,y) + 1.0
  z, t = g(x,w)
  
new_contents: # coding: utf-8
  
  def f(u,v):
      t = u - v
      return t
  
  def g(x,v):
      m = x - v
      t =  2.0 * m
      z =  2.0 * t
      return t, z
  
  x = 1.0
  y = 2.0
  
  w    = 2 * f(x,y) + 1.0
  z, t = g(x,w)
  
  print(z)
  print(t)
  
subject: test functions