What should I do about the oaths I made but do not remember after losing the paper on which I wrote them?

If you do not know the number of oaths you have broken, then you must exercise caution and act based on what you predominantly believe, then offer expiation for them. If oaths regarding a single matter are numerous, one expiation suffices for them, provided expiation was not offered for the first. However, if the nature of the sworn-upon matters varies, then each oath requires its own expiation. It is obligatory to exercise caution with an expiation that absolves one's responsibility. It is also advised not to excessively swear by Allah Almighty, as it is blameworthy in Islamic law.