" The solution of the differential equation,"ydx+(x+x^(2)y)dy=0" is "

Solution of the differential equation y dx+(x-y^(2))dy=0 is

The solution of the differential equation y^(2)dx- x^(2)dy = 0 is

The solution of the differential equation ydx-(x+2y^(2))dy=0 is x=f(y). If f(-1)=1, then f(1) is equal to

The general solution of the differential equation ydx+(x+2y^(2))dy=0 is

The general solution of the differential equation ydx+(x+2y^(2))dy=0 is

If x=x(y) is the solution of the differential equation, ydx-(x+2y^2)dy=0 , with x(-pi)=pi^2 , then x is equal to :