Question

suprimir parentesis y resolver 1-[6+(2+3)+(7-4)-(-7)+1]=

Answer 1

1-[6+(2+3)+(7-4)-(-7)+1]=
1-[6+2+3+7-4+7+1]=
1-6-2-3-7+4-7-1=
-21

Answer 2

1-[6+5+3+7+1]= 1- [22] =1-22 = -21

la respuesta nos quedo negativa es decir = -21