Math Help - Methods of solving differential equations.

1. Methods of solving differential equations.

I am not sure which method to solve these, If anyone could just tell which method I can use to solve them. The ones I know are: Using a integrating factor, method of separable equations, exact equations.

1. $\frac{dy}{dt} = \frac{5y+3t^4}{t}$

2. $\frac{dy}{dx} = -\frac{2x+y^4}{4xy^3}$

3. $y^i = -\frac{4t^3y+2y-5}{t^4+2y}$

(above: Suppose to be y prime)

2. I believe I figured out the second one. It is an exact equation.

3. 1. integrating factor