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- 7 - (+ 2 - 8 + 4) + (- 5 + 2) - (- 3)=
- 7 - (2 + 4 - 8) + (- 5 + 2) - (- 3) =
- 7 - (6 - 8) + (- 3) + 3 =
- 7 - (- 2) - 3 + 3 =
- 7 + 2 - 3 + 3 =
2 + 3 - 7 - 3 =
5 - 10 =
- 5
Respuesta.
- 5