Question

efectuar -(6-3)-{2-(5-7)-3}+ ??????

Answer 1

- (6 - 3) - {2 - (5 - 7) - 3}

- (3) - {2 - (- 2) - 3}

- 3 - {2 + 2 - 3}

- 3 - {4 - 3}

- 3 - {1}

- 3 - 1

- 4

Solución : 

- 4 

Answer 2

-(6-3)-{2-(5-7)-3}
-(3)-{2-(-2)-3}
-3-{2+2-3}
-3-[4-3]
-3-[1]
-3-1
-4