-17+{41-[24-(88-54)]}= -62-{-31+[24-71-(31-15)]}=

-17+{41-[24-(88-54)]}=-17+{41-[24-34]}=-17+{41-[-10]}=-17+{41+10]}=-17+{51}= =51-17=34   -62-{-31+[24-71-(31-15)]}=-62-{-31+[24-71-16]}=-62-{-31+(-63)}=-62-{-94}=-62+94= =94-42=52