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(-3)x(7)-3+(2)
-21-3+2=-22
[15-(23-5)].[5+(6-4)]-3+(8-6)
[15-(18)].[5+(2)]-3+(2)
[15-18].[5+2]-3+2
[-3].[+7]-3+2
-21-3+2
-24+2
-22
RESPUESTA:LA "C" QUE ES -22.Espero que te sirva.