You have alternative line breaking in infix also. All of it sucks compared to keeping it on one line, though:

  x * (y + z) = x * z + y * z


  x * (y + z) =
  x * z + y * z


  x * (y + z)
  = x * z + y * z


   x *
   (y + 
    z)
  =
   x *
   z
      +
   y *
   z

etc.