You can use the product rule for the first, the quotient rule for the second, and a combination of the two for the third. Here is the first:

1) y = (x^2)*f(x)

y' = (2x)*f(x) + (x^2)*f '(x)

(I made the space so you could tell it was the derivative) I would do the others, but I don't have the time. I hope this helps, though.