From the differential equation of the family of concentric circles `x^(2)+y^(2)=a^(2),where a gt 0` and a is a parameter.

Find the differential equation of the family of concentric circles x^2+y^2=a^2 .

Find the differential equation of the family of circles x^(2) + y^(2) = 2ay , where a is a parameter .

Find the differential equation of the family of circles x^(2) + y^(2) = 2ax , where a is a parameter .

From the differential equation of the family of curves y^(2)=m(a^(2)-x^(2)), where a and m are parameters.

From the differential equation of the family of circles (x -a)^(2) + (y - a)^(2) - a^(2) , where a is an arbitrary constant .

From the differential equation of the family of curves given by x^(2)+y^(2)-2ay=a^(2), where a is an arbitrary constant.

From the differential equation for the family of the curves (y-b)^(2)=4(x-a), where a and b are parameters.

From the differential equation for the family of the curves ay^(2)=(x-c)^(3), where c is a parameter.