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<?php echo preg_replace('`{[^{}]+}(\((?>[^()]+|(?1))+\))`', '<$0>', 'test {22413}(ghfhgfhg((2))sd(d)sf) s{1}(l(k)l)dfdsf {5}(45d4fsdf4)');

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35.73 ms | 402 KiB | 5 Q