1. (X2+2y)dy=(cosx-2xy)dx
x2y+y2=sinx+C
2. (2y+x)dy=(3x2-y)dx
y2+xy=x3+C
3. (2x2+4y2)dx+8xydy=0
2/3x2+4xy2+C=0
4. (2xy+1)dy=(3x2-y2)dx
xy2+y=x2+1+C
5. (ey+x-3y2)dy=(2x-y)dx
ey+xy=x2+y3+C
6. (6x2+y)dx+(9y2-2yx)dy=0
2x3+3y3-y2+2xy+C=0
7. (8x+2y+7)dx+(2x-4y+3)dy=0
4x2-2y2+2xy+7x+3y+C=0
15. (3x+6y+4)dx+(2x-5y+7)dy=0
-y2+4xy+4x+7y+C=0
16. y3dx+(2xy2+3y)dy=0
y2+2y-2xy+C=0
17. dy/dx=(2x-y)/(2y+x-3y2)
y2+xy+C=x2+y3
8. dy/dx=x/y
y2-x2+C=0
9. (2x+6y+4)dx+(6x+9y-7)dy=0
x2+6xy+4x+9/2y2-7y=0
10. dy/dx=ycosx
y=Cesinx
11. dy/dx=2x/(1-2y)
x2+y2-y+C=0
12. (4x3+6x2+2y+4)dx(y2+4y+1/y+2x)dy=0
x4+2x3+2xy+4x+1/3y3+2y2+lny+C=0
13. (2y-2)dy=2xdx
y2-2y-x2+C=0
14.(y2-2x)dy=(2y-x2)dx
x3+y3-6xy+C=0