(4m^2n - 3n^2)^2
9x^2 + 30xy + 25y^2
x^2+2x+1
4a^2-16ab+16b^2
(2z + 7)^2
(2a+4b)^2
(3x + 5y)^2
16m^4n^2 - 24m^2n^3 + 9n^4
(x+1)^2
4z^2 + 28z + 49
