Question

55divided
[17-{15-3
(7-4)}]

Answer 1

Here is your answer
$55 \div (17 - (15 - 3(7 - 4))) \\ 55 \div (17 - (15 - 3(3))) \\ 55 \div (17 - (15 - 9)) \\ 55 \div (17 - 6) \\ 55 \div (11) \\ 5$
Hope it helps you