49/9
14/9
7
7/3
5/3
2/3
3/5
5/7
27
47
49
51
x3 - 3
(x - 1)3
x3 - 1
x3 + 4x2 +1
2x4 + 1
2x2x4 - 1
2x2x4 + 1
2x4 - 1
15
17
19
23
0
2
6
4
-1
1
2a + 1
2a - 1
-27
-18
18
a - 1
a
a + 1