1. Find the general solution of (general integral) of the differential equation.
1.12 3exsinydx + (1 - ex) cosydy = 0

2. Find the general solution of (general integral) of the differential equation.
2.12 (1 + y2) dx - (y + yx2) dy = 0

3. Find the general solution of (general integral) of the differential equation.
3.12 xy = √x2-y2 + y

4. Find a particular solution of (partial integral) of the differential equation.
4.12 y = y / (3x - y2), y (0) = 1

5. Find the general solution of the differential equation.
5.12 (x + 1) (y + y2) = -y

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