(2*a + 1)*(5*a - 6)
(2*a + 1)*(5*a - 1*6)
1*(a + 1/2)*(a - 6/5)
(1*(a + 1/2))*(a - 6/5)
(1.0 + 2.0*a)*(-6.0 + 5.0*a)
2 -6 - 7*a + 10*a
-6 - 7*a + 10*a^2