1. Find the general solution of (general integral) of the differential equation.
1.23 (1 + e3y) xdx = e3ydy

2. Find the general solution of (general integral) of the differential equation.
2.23 y '= (1 + y2) / (1 + x2)

3. Find the general solution of (general integral) of the differential equation.
3.23 xy + y (lny / x-1) = 0

4. Find a particular solution of (partial integral) of the differential equation.
4.23 xy + y = sinx, y (π / 2) = 2 / π.

5. Find the general solution of the differential equation.
5.23 xy + y = y2lnx

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