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

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42.5 ms | 402 KiB | 5 Q