Return all substrings that are contained within braces ({}).
For example:
str = 'x = rho*x{-1} + (1-rho)*y{+1}';
when passed to the function, should return a cell with '-1' and '+1' as its contents.
I polished up this problem and added more test cases.
906 Solvers
Given a window, how many subsets of a vector sum positive
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poll: would you like the regexp (?@cmd) functionality to be banned in Cody?
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