Add spaces: Atfirstunobservable,microscopicdimensions,damagedareasarerapidlyincreasingbygrowing.Marginsturnbrown,forinstanceliketheendofatornleaf.

Answer: At first unobservable, microscopic dimensions, damaged areas are rapidly increasing by growing. Margins turn brown, for instance like the end of a torn leaf.

Add spaces: Makeaphonecallfortheselectedfield'snumericcontents,whichwillbetreatedasaphonenumber.

Answer: Make a phone call for the selected field's numeric contents, which will be treated as a phone number.

Add spaces: Recognitionofthenewschemeofpreparationofspecialistsforcedtoamendtermandcontentofthetraining.

Answer:
Recognition of the new scheme of preparation of specialists forced to amend term and content of the training.