7*(x + 8)*(x - 8)
7*(x + 8)*(x - 1*8)
1*(x + 8)*(x - 8)
(1*(x + 8))*(x - 8)
2 -448 + 7*x
-448 + 7*x^2
7.0*(8.0 + x)*(-8.0 + x)
7*(-8 + x)*(8 + x)