A := Matrix(13, 13, [[-8*as^3,0,0,0,0,-4*as^4+4*as^2*ds^2-4*as^2*fs^2,0,4*as^4-\
4*as^2*bs^2+4*as^2*cs^2,0,0,0,0,0],[0,-8*as^3,0,0,0,0,0,0,0,4*as^4-4*as^2*bs^2+
4*as^2*cs^2,0,0,0],[0,0,-8*as^3,0,0,0,8*as^3,0,0,-4*as^4+4*as^2*ds^2-4*as^2*fs^
2,4*as^4-4*as^2*bs^2+4*as^2*cs^2,0,0],[0,0,0,8*as^3,0,0,0,0,0,0,0,-4*as^4+4*as^
2*bs^2-4*as^2*cs^2,0],[0,0,0,0,-8*as^3,0,0,0,0,0,0,0,4*as^4-4*as^2*bs^2+4*as^2*
cs^2],[0,0,0,0,-4*as^4+4*as^2*bs^2-4*as^2*cs^2,-8*as^3,0,0,0,0,0,0,8*as^3*cs^2]
,[0,0,8*as^3,0,0,0,0,0,0,0,-4*as^4+4*as^2*bs^2-4*as^2*cs^2,0,0],[0,0,0,0,4*as^4
-4*as^2*ds^2+4*as^2*fs^2,0,0,8*as^3,0,0,0,0,-4*as^3*cs^2+4*as^3*es^2-4*as^3*fs^
2],[0,0,0,0,0,0,0,0,8*as^3,0,0,0,-48*as^2*vo],[0,0,4*as^4-4*as^2*ds^2+4*as^2*fs
^2,0,0,0,-4*as^4+4*as^2*ds^2-4*as^2*fs^2,0,0,8*as^3*fs^2,-4*as^3*cs^2+4*as^3*es
^2-4*as^3*fs^2,-48*as^2*vo,0],[0,4*as^4-4*as^2*ds^2+4*as^2*fs^2,-4*as^4+4*as^2*
bs^2-4*as^2*cs^2,0,0,0,0,0,0,-4*as^3*cs^2+4*as^3*es^2-4*as^3*fs^2,8*as^3*cs^2,0
,0],[0,0,0,-4*as^4+4*as^2*bs^2-4*as^2*cs^2,0,0,0,0,0,-48*as^2*vo,0,8*as^3*cs^2,
0],[4*as^4-4*as^2*ds^2+4*as^2*fs^2,0,0,0,0,8*as^3*fs^2,0,-4*as^3*cs^2+4*as^3*es
^2-4*as^3*fs^2,-48*as^2*vo,0,0,0,0]]);
