\relax 
\newlabel{eq13}{{13}{6}}
\newlabel{eq16}{{16}{7}}
\newlabel{eq17}{{17}{7}}
\newlabel{eq19}{{19}{8}}
\newlabel{eq22}{{22}{9}}
\newlabel{eq23}{{23}{9}}
\newlabel{17}{{26}{11}}
\newlabel{21}{{47}{30}}
\newlabel{22}{{48}{30}}
\newlabel{23}{{49}{30}}
\newlabel{24}{{50}{31}}
\newlabel{25}{{51}{31}}
\newlabel{27}{{53}{31}}
\newlabel{30}{{54}{32}}
\newlabel{40}{{55}{33}}
\newlabel{41}{{56}{33}}
\newlabel{42}{{57}{34}}
\newlabel{25a}{{61}{34}}