Question

- {-2(1-3+[-1+7]-2)-9}

Answer 1

solucion

- {-2(1-3+[-1+7]-2)-9} =

-{-2(-2+ [6]-2)-9} =

-{-2(4-2 )-9} =

-{-2(2)-9} =

-{-4-9}=

-{-13}= 13

saludos