EquationSymbolicSolveRequest[List[Equal[Minus[λ_2,λ_1],E]],List[λ_2]]Solution[{λ_2,ExpressionSetPoint[Sum[E,λ_1],False,ReservedComplex]}]EquationSymbolicSolveRequest[List[Equal[Minus[λ_2,λ_1],E]],List[λ_1]]Solution[{λ_1,ExpressionSetPoint[Sum[λ_2,Negative[E]],False,ReservedComplex]}]EquationSymbolicSolveRequest[List[Equal[Minus[λ_2,λ_1],E]],List[E]]Solution[{E,ExpressionSetPoint[Sum[λ_2,Negative[λ_1]],False,ReservedComplex]}]