old_contents: def add(a,b):
  	return a+b
  print add(1,2)
  def sub(c,d):
      return c-d
  print sub(5,3)
  def mul(e,f):
      return e*f
  print mul(4,4)
  def div(g,h):
  	return g/h
  print div(2.0,3)
  def hours_from_seconds(seconds):
      return seconds / 3600
  print hours_from_seconds(86400)
  import math
  def circle_area(radius):
      return math.pi * radius**2
  print circle_area(5)
  def sphere_volume(radius):
      return 4.0/3 * math.pi * radius **3
  print sphere_volume(5)
  def avg_volume(a, b):
      return ((1.0/6 * math.pi * a**3) + (1.0/6 * math.pi * b**3)) / 2
  print avg_volume(10,20)
  def area(a, b, c):
      s = (a+b+c)/2
      return (s*(s-a)*(s-b)*(s-c)) ** 0.5
  print area(1,2,2.5)
  def right_align(word):
  	return str((80 - len(word))*" " + word)
  print right_align("Hello")
  def center(word):
  	return str((40 - len(word))*" "+word)
  print center("Hello")  
  def msg_box(word):  
  	return "+" + (len(word)*"-") + "+" \n "|" + word + "|" \n "+" + (len(word)*"-") + "+"
  
new_contents: def add(a,b):
  	return a+b
  def sub(c,d):
      return c-d
  def mul(e,f):
      return e*f
  def div(g,h):
  	return g/h
  def hours_from_seconds(seconds):
      return seconds / 3600
  import math
  def circle_area(radius):
      return math.pi * radius**2
  def sphere_volume(radius):
      return 4.0/3 * math.pi * radius **3
  def avg_volume(a, b):
      return ((1.0/6 * math.pi * a**3) + (1.0/6 * math.pi * b**3)) / 2
  def area(a, b, c):
      s = (a+b+c)/2
      return (s*(s-a)*(s-b)*(s-c)) ** 0.5
  def right_align(word):
  	return str((80 - len(word))*" " + word)
  def center(word):
  	return str((40 - len(word))*" "+word) 
  def msg_box(word):  
  	return "+" + ((len(word) + 4)*"-") + "+" + '\n' + "|" + (2*" ") + word + (2*" ") + "|" + '\n' + "+" + ((len(word) + 4)*"-") + "+"
  w = add(2,3)
  print w
  w = add(2,3)
  print w
  x = sub(3,2)
  print x
  x = sub(3,2)
  print x
  y = mul(4,4)
  print y
  y = mul(4,4)
  print y
  t = div(2,3)
  print t
  t = div(2,3)
  print t
  u = hours_from_seconds(86400)
  print u
  u = hours_from_seconds(86400)
  print u
  f = circle_area(5)
  print f
  f = circle_area(5)
  print f
  h = sphere_volume(5)
  print h
  h = sphere_volume(5)
  print h
  i = avg_volume(10,20)
  print i
  i = avg_volume(10,20)
  print i
  k = area(1,2,2.5)
  print k
  k = area(1,2,2.5)
  print k
  l = right_align("Hello")
  print l
  l = right_align("Hello")
  print l
  hi = center("Hello") 
  print hi
  hi = center("Hello") 
  print hi
  message = msg_box("Hello")
  print message
  message_2 = msg_box ("I eat cats!")
  print message_2
  
subject: edit again