Question
Simplify the following: $27-\Big[38-\big\{46-(15-\overline{13-2})\big\}\Big]$
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Answer
$27-\Big[38-\big\{46-(15-\overline{13-2})\big\}\Big]$ $=27-\big[38-\{46-(15-11)\}\big]$ $=27-\big[38-(46-4)\big]$ $=27-\big[38-42\big]$ $=127-[-4]$ $=27+4$ $=31$ $\therefore27-\Big[38-\big\{46-(15-\overline{13-2})\big\}\Big]=31$
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