/ 2 \ (3*a + 4)*\3*a + a - 4/
(3*a + 4)*(3*a^2 + a - 1*4)
1*(a + 4/3)*(a - 1)
(1*(a + 4/3))*(a - 1)
3 2 -16 - 8*a + 9*a + 15*a
-16 - 8*a + 9*a^3 + 15*a^2
3 2 -16 - 8*a + 9*a + 15*a
-16 - 8*a + 9*a^3 + 15*a^2
2 (4 + 3*a) *(-1 + a)
(4 + 3*a)^2*(-1 + a)