{{-e^-1 + 2*e^-4, e^-1 - e^-4}, {-2*e^-1 + 2*e^-4, 2*e^-1 - e^-4}} * {{-e^1 + 2*e^4, e^1 - e^4}, {-2*e^1 + 2*e^4, 2*e^1 - e^4}}

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