Respuesta: -3
Explicación paso a paso:
3-[4-(5-7)]-{9-[5-(-4)]}
3-[4-(-2)]-{9-[5+4]}
3-[4+2]-{9-[9]}
3-[6]-{9-9}
3-6-0
-3-0
-3
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Respuesta: -3
Explicación paso a paso:
3-[4-(5-7)]-{9-[5-(-4)]}
3-[4-(-2)]-{9-[5+4]}
3-[4+2]-{9-[9]}
3-[6]-{9-9}
3-6-0
-3-0
-3