13.exp

a = 
  b
  where blah = 
          blah
        -- hello
        -- bye
        hello = 
          hello

a = 
  b
  where blah = 
          blah
        -- bye
        hello = 
          hello

foo = 
  x -- test
  where x = 
          blah

foo = 
  x
  where 
        -- another test
        x = 
          blah

f = 
  case undefined of
    Just p
    -- If it's the potato.
      | zot -> 
        undefined
      |
      -- The geriatric concumbine.
        otherwise -> 
        hael