17 17 17 17 Overline 17 17

17 – [17 — {17 — (17 – )}]

Answers:

17- [17 – {17 – (17 –\overline { 17 -17 })}]
= 17- [17 – {17 – (17 – l0)}]
= 17 – [17 – {17 — 17}]
= 17 — [17 — 0]
= 17 – 17
= 0