How do i factor this polynomial out

How do i factor this polynomial out?

4m^4n^2+4m^3n^2+m^2+n^2

maybe you meant to write?


4m^5n^2 +4m^3n^4 +m^2 +n^2 = (4m^3n^2 +1)(m^2 +n^2)

or

4m^5 +4m^3n^2 +m^2 +n^2 = (4m3 +1)(m2+n2)

or something else, but what you did write can not be factored.