2 x + 10*x + 25
x^2 + 10*x + 25
x + 5
2 25 + x + 10*x
25 + x^2 + 10*x
25 + x*(10 + x)
25.0 + x^2 + 10.0*x
2 (5 + x)
(5 + x)^2