Best bet to clear these types of stoppages is the following
1- Remove the basin trap and looking into the drain pipe make sure the snake wire goes down steam not up the vent
2- Snaking from the bath tub although very common one has to know the tub waste is either lead, galvanized or plastic piping all of these are very short radius and at best hard to make the required bends especially going through a trap 180 degree's
If you puncture the bra tubing waste of the lead piping your looking for a very expensive repair job.
The use of chemicals is really not even considered an option
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