Export a range of cells as tab-separated values (ses-export-tsv).
Export a range of cells as tab-separated formulas (ses-export-tsf).
The exported text goes to the kill ring; you can paste it into another buffer. Columns are separated by tabs, rows by newlines.
To import text, use any of the yank commands where the text to paste contains tabs and/or newlines. Imported formulas are not relocated.