Linux bash wildcards and multiple file name paterns

ls -l trc/CC/CC_SRV_ReloadExec_{Opsc,Pfe,OCS}*
tail -f trc/CC/CC_SRV_ReloadExec_{Opsc,Pfe,OCS}*

find files with name like core.12345

find | grep "core\.[0-9]\{1,5\}$"

find | grep "^./core\.[0-9]\{1,5\}$"

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