i'd like to create a line break in a formula, but char 13 doesn't work

I've never understood that limitation in the function, other than for compatibility with Excel. You can use 8232 instead. It is a unicode line separator character.

Try option-return, as Ive done here between 15 and *2000.

(Numbers automatically replaces the multiplication operator ( * ) with the multiplication sign (×).

Regards,

Barry

Option Return works. If in a formula it needs to be in quotes.