Question

r = - 5+{ - 4 - [5-6+ (3-4)] + 6}

Answer 1

Oi

-5+{-4-[5-6+(3-4)]+6}
-5+{-4-[5-6+(-1)]+6}
-5+{-4-[5-6-1]+6}
-5+{-4-[-2]+6}
-5+{-4+2+6}
-5+{-4+8}
-5+{-4}
-5-4
-9

Espero ter ajudado!!!