36 m^2 + 48n + 16 n^2
c^2 - 10c + 25
(3a - 5b) (3a+5b)
(c-5)^2
64 b^2 - 25 a ^2
(3x - 5a) (9 x^2 + 15xa + 25 a^2)
(x^3 - y^2)( x^6 + x^3 y^2 + y ^ 4)
x^2 + 4 x + 4
a^3 + 6 b^3
(5+y)( 25 - 5y + y^2)
(5m - 7n) (5m + 7n)
(61 - 51)(61+ 51) = 10 * 112= 1120
36 n^2 - 16 m^2
(x+4)^ 2
(x^3 + 3)(x^6 - 3 x^3 + 9)