1. Find the general solution of (general integral) of the differential equation.
1.19 1 + (1 + y ') ey = 0

2. Find the general solution of (general integral) of the differential equation.
2.19 xy - y = y2

3. Find the general solution of (general integral) of the differential equation.
3.19 (x - y) ydx - x2dy = 0

4. Find a particular solution of (partial integral) of the differential equation.
4.19 (x + y2) dy = ydx, y (0) = 1.

5. Find the general solution of the differential equation.
5.19 x (x - 1) y + y3 = xy

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