Formula_15385

\[\begin{gathered}v_{1}=i, v_{2}=j, v_{3}=k, \\Q_{1}=Q_{2}=N_{3} N_{4}+N_{5} N_{6}-2 N_{1} N_{2}, \\Q_{3}=Q_{4}=N_{1} N_{2}+N_{5} N_{6}-2 N_{3} N_{4}, \\Q_{5}=Q_{6}=N_{1} N_{2}+N_{3} N_{4}-2 N_{5} N_{6} .\end{gathered}\]