Question

-(-6-8)+(9-0)=

-3-(-9-7+3-1)=

-5-11+(-9-7)-6=
{-9-(-4-3)+1}=

Answer 1

-(-6-8)+(9-0)=

+6-8+9=

-2+9=10

-3-(-9-7+3-1)=

-3+9-7+3-1=

-3-7-1+9+3

-11+12=1

-5-11+(-9-7)-6=

-16-9-7-6= -38

{-9-(-4-3)+1}=

-9+4-3+1

-12+5=-7