{{Y_{ccT1} + Y_{CargaA} + Y_{Cap1} + Y_{AB} + Y_{CA}, -Y_{AB}, -Y_{CA}, 0},
 {-Y_{AB}, Y_{AB} + Y_{BD} + Y_{ccT2} + Y_{CargaB} + Y_{Cap2}, 0, -Y_{BD}},
 {-Y_{CA}, 0, Y_{CA} + Y_{ccT3} + Y_{CargaC} + Y_{DC} + Y_{Cap3}, -Y_{DC}},
 {0, -Y_{BD}, -Y_{DC}, Y_{ccT4} + Y_{CargaD} + Y_{BD} + Y_{DC} + Y_{Cap4}}}

Y_{11}*(Y_{22}*((Y_{33}*Y_{44})-(Y_{43}*Y_{34}))-Y_{23}*((Y_{32}*Y_{44})-(Y_{34}*Y_{42}))+Y_{24}*((Y_{32}*Y_{43})-(Y_{33}*Y_{42}))

-Y_{21}*(Y_{12}*((Y_{33}*Y_{44})-(Y_{43}*Y_{34}))-Y_{13}*((Y_{32}*Y_{44})-(Y_{34}*Y_{42}))+Y_{14}*((Y_{32}*Y_{43})-(Y_{33}*Y_{42}))

Y_{31}*(Y_{12}*((Y_{23}*Y_{44})-(Y_{24}*Y_{43}))-Y_{13}*((Y_{22}*Y_{44})-(Y_{24}*Y_{42}))+Y_{14}*((Y_{22}*Y_{43})-(Y_{23}*Y_{42}))



Y_{11} * (Y_{22} * ( Y_{33} * Y_{44} - Y_{43} * Y_{34} ) -Y_{23} * ( Y_{32} * Y_{44}  - Y_{34} * Y_{42} )+ Y_{24} * (Y_{32} * Y_{43}- Y_{33}*Y_{42} ))

-Y_{21}*(Y_{12}* (Y_{33}*Y_{44}-Y_{43}*Y_{34})-Y_{13}*(Y_{32}*Y_{44}-Y_{34}*Y_{42})+Y_{14}*(Y_{32}*Y_{43}-Y_{33}*Y_{42}))

Y_{31}*(Y_{12}*(Y_{23}*Y_{44}-Y_{24}*Y_{43})-Y_{13}*(Y_{22}*Y_{44}-Y_{24}*Y_{42})+Y_{14}*(Y_{22}*Y_{43}-Y_{23}*Y_{42}))

Y_{11} * (Y_{22} * ( Y_{33} * Y_{44} - Y_{43} * Y_{34} ) -Y_{23} * ( Y_{32} * Y_{44}  - Y_{34} * Y_{42} )+ Y_{24} * (Y_{32} * Y_{43}- Y_{33}*Y_{42} ))-Y_{21}*(Y_{12}* (Y_{33}*Y_{44}-Y_{43}*Y_{34})-Y_{13}*(Y_{32}*Y_{44}-Y_{34}*Y_{42})+Y_{14}*(Y_{32}*Y_{43}-Y_{33}*Y_{42}))Y_{31}*(Y_{12}*(Y_{23}*Y_{44}-Y_{24}*Y_{43})-Y_{13}*(Y_{22}*Y_{44}-Y_{24}*Y_{42})+Y_{14}*(Y_{22}*Y_{43}-Y_{23}*Y_{42}))



Delta_{12}


(Y_{21}*(Y_{33}*Y_{44}-Y_{34}*Y_{43})-Y_{23}*(Y_{31}*Y_{44}-Y_{34}*Y_{41})+Y_{24}*(Y_{31}*Y_{43}-Y_{33}*Y_{41}))