Question

-10-{-2+[+1-(-3-5)+3]}

Answer 1

-10-{-2+[+1-(-3-5)+3]}
-10-{-2+[+1-(-8)+3]}
-10-{-2+[+12]}
-10-{+10}
-10-10=-20

Answer 2

-10-{-2+[+1-(-3-5)+3]}
-10-{-2+[+1+3+5+3]}
-10-{-2+[12]}
-10-{-2+12}
-10-{10}
-10-10
-20