(2*x - 1)*(2*x + 1)
(2*x - 1*1)*(2*x + 1)
1*(x + 1/2)*(x - 1/2)
(1*(x + 1/2))*(x - 1/2)
(1 + 2*x)*(-1 + 2*x)
(1 + 2*x)*(-1 + 2*x)
(1 + 2*x)*(-1 + 2*x)
(1 + 2*x)*(-1 + 2*x)
2 -1 + 4*x
(1 + 2*x)*(-1 + 2*x)
(1 + 2*x)*(-1 + 2*x)
(1 + 2*x)*(-1 + 2*x)
(1 + 2*x)*(-1 + 2*x)
(1 + 2*x)*(-1 + 2*x)
(1 + 2*x)*(-1 + 2*x)