Database
[{number:"12/34",type:"string"},{number:"56-78",type:"string"},{number:"910*2",type:"string"}]
Query
db.collection.aggregate([{"$addFields":{"sanitized":{"$regexFindAll":{"input":"$number","regex":"\\d"}}}},{"$addFields":{"sanitized":{"$reduce":{"input":"$sanitized.match","initialValue":"","in":{"$concat":["$$value","$$this"]}}}}},{"$match":{$expr:{"$in":["$sanitized",["1234","5678"]]}}},{"$project":{sanitized:false}}])