(x + 2)^2
(3x - 5)^2
(yz - 6)^2
(4ac + 6d) (4ac - 6d)
(9x - 3y)^2
(-x - 8)^2
(6a - 5bc)^2
(8b + 2d)^2
(4ab + 2c)^2
(9x + 7yz) (9x - 7yz)
