Principal symbol characteristic results

	$\displaystyle$	$\displaystyle -2(\xi_1^2C_{15} + \xi_3^2C_{53} + \xi_3(\xi_1(C_{13} + C_{55}) +... ... \xi_2(\xi_2C_{64} + \xi_1(C_{14} + C_{65}))) (-4(\xi_1^2C_{15} + \xi_3^2C_{53}$
	$\displaystyle$	$\displaystyle + \xi_3(\xi_1(C_{13} + C_{55}) + \xi_2(C_{54} + C_{63})) + \xi_2(... ... + C_{65}))) (-(\rho\eta^2) + \xi_2^2C_{22} + 2\xi_2\xi_3C_{24} + \xi_3^2C_{44}$
	$\displaystyle$	$\displaystyle + 2\xi_1\xi_2C_{62} + 2\xi_1\xi_3C_{64} + \xi_1^2C_{66}) + 4(\xi_... ...C_{44}) + \xi_1(C_{54} + C_{63})) + \xi_2(\xi_2C_{24} + \xi_1(C_{52} + C_{64}))$
	$\displaystyle$	$\displaystyle + \xi_1^2C_{65})(\xi_1^2C_{16} + \xi_3^2C_{54} + \xi_3(\xi_2(C_{5... ...4} + C_{65})) + \xi_2(\xi_2C_{62} + \xi_1(C_{12} + C_{66})))) + 2(\xi_3^2C_{43}$
	$\displaystyle$	$\displaystyle + \xi_3(\xi_2(C_{23} + C_{44}) + \xi_1(C_{54} + C_{63})) + \xi_2(... ...52} + C_{64})) + \xi_1^2C_{65}) (4(\xi_3^2C_{43} + \xi_3(\xi_2(C_{23} + C_{44})$
	$\displaystyle$	$\displaystyle + \xi_1(C_{54} + C_{63})) + \xi_2(\xi_2C_{24} + \xi_1(C_{52} + C_... ...\eta^2) + \xi_1^2C_{11} + 2\xi_1\xi_3C_{15} + 2\xi_1\xi_2C_{16} + \xi_3^2C_{55}$
	$\displaystyle$	$\displaystyle + 2\xi_2\xi_3C_{65} + \xi_2^2C_{66}) - 4(\xi_1^2C_{15} + \xi_3^2C... ..._{55}) + \xi_2(C_{54} + C_{63})) + \xi_2(\xi_2C_{64} + \xi_1(C_{14} + C_{65})))$
	$\displaystyle$	$\displaystyle (\xi_1^2C_{16} + \xi_3^2C_{54} + \xi_3(\xi_2(C_{52} + C_{64}) + \... ...\xi_1(C_{12} + C_{66})))) - 2(-(\rho\eta^2) + \xi_3^2C_{33} + 2\xi_2\xi_3C_{43}$
	$\displaystyle$	$\displaystyle + \xi_2^2C_{44} + 2\xi_1\xi_3C_{53} + 2\xi_1\xi_2C_{54} + \xi_1^2... ...22} + 2\xi_2\xi_3C_{24} + \xi_3^2C_{44} + 2\xi_1\xi_2C_{62} + 2\xi_1\xi_3C_{64}$
	$\displaystyle$	$\displaystyle + \xi_1^2C_{66})(-(\rho\eta^2) + \xi_1^2C_{11} + 2\xi_1\xi_3C_{15... ...^2C_{55} + 2\xi_2\xi_3C_{65} + \xi_2^2C_{66}) - 4(\xi_1^2C_{16} + \xi_3^2C_{54}$
	$\displaystyle$	$\displaystyle + \xi_3(\xi_2(C_{52} + C_{64}) + \xi_1(C_{14} + C_{65})) + \xi_2(\xi_2C_{62} + \xi_1(C_{12} + C_{66})))^2)$