Complex sentence: Note, that both positive and negative values for\\ mu are acceptable, since\\ mu belongs to the real line of numbers, hence, the sign is not important because the distribution is symmetric with respect to it.
Split into simpler sentences: Note, that both positive and negative values for\\ mu are acceptable, since\\ mu belongs to the real line of numbers. In addition, the sign is not important because the distribution is symmetric with respect to it.