implicit differentiation (finding the 1st and 2nd derivative)

With these, i cannot get the answer that is said from the book.

1. y^2 = e^(x^2) + 2x

I already got the 1st one which is: (xe^(x^2) + 1) / y

for the 2nd:

((y)(e^(x^2) + (2x^2)e^(x^2)) - (xe^(x^2) + 1)(y')) / y^2

((y)(e^(x^2) + (2x^2)e^(x^2)) - (xe^(x^2) + 1)((xe^(x^2) + 1) / y))

/ y^2

Multiplied by y and got:

(y^2*e^(x^2) ( 1+2x^2) - (xe^(x^2))(xe^(x^2) + 1)) / y^3 and this is

where I totally got lost... but the book said the answer is

(((2x^2)*(y^2) + y^2 - 2x)(e^(x^2)) - x^2e^(2x^2) - 1) / y^3

2. 2 *sqrt(y) = x - y

using the product rule:

I got y^(-1/2) = 1 - y'

I multiplied a sqrt(y) (to get rid of the fraction), but it didn't do me any good and eventually got

completely confused. The answer says sqrt(y)/(sqrt(y) + 1) for the 1st

and 1 / (2(sqrt(y) + 1) ^3 for the 2nd.

really need help on this 1...

I think I fixed most of the errors on both problems... but somehow, i still get the wrong answer.(Headbang)(Headbang)(Headbang)