1 2 -- - x 25
1/25 - x^2
(x + 1/5)*(x - 1/5)
0.04 - x^2
2 1 - 25*x --------- 25
(1 - 25*x^2)/25
-(1 + 5*x)*(-1 + 5*x) ---------------------- 25
-(1 + 5*x)*(-1 + 5*x)/25