How do sharks raise their young?

When a shark gives birth if it is in an egg it can take around 7 months for it to hatch. But some sharks are born from live birth. After sharks are born the mother leaves, the pups are left to fend for them selves.
70% of sharks give birth to live offspring. These "pups" are self sufficient as soon as they are born. So no, sharks DON'T take care of their pups.

Then, the other 30% born through eggs ...they don't take care of those either. lay'em and go.

The most a shark does for its young is carry the pups inside the womb in a placenta or egg(filled with nutrients). Once they are born they fend for themselves.