Complex sentence: Since\\ tfrac is rational, we set it equal to\\ tfrac in lowest terms; and we observe that\\ tfrac equals the reciprocal of\\ tfrac and hence equals the reciprocal of\\ tfrac, and thus equals\\ tfrac.
Split into simpler sentences: Since\\ tfrac is rational, we set it equal to\\ tfrac in lowest terms. We also observe that\\ tfrac equals the reciprocal of\\ tfrac and hence equals the reciprocal of\\ tfrac, and thus equals\\ tfrac.