(y^2 +8)
x^2 +10x +25
m^2 +2mn +n^2
(x +2)^2
(m + n)^2
(a +b)^2
m^4 +2m^2n^3 +n^6
x^2 +4x +4
(x -5)^2
(a -b)^2
(m^2 +n^3)^2
(x -2)^2
y^2 +16y^2 +64
a^2 - 2ab + b^2
x^2 -4x +4
a^2 +2ab +b^2
