Have a blocked and corroded drain line from washing machine and kitchen sink. Need to replace about 30 feet of line. Any way to do without tearing up slab?

Any way to do without tearing up slab
If they're on a outside wall there is a possibility that the branches can be brought out side and run around the house to tie back to your sewer.
I did that with my own sink and washer. The vents will stay in place as usual and not be disturbed.
Good luck, Tom