2x/6x^3
6x^2/9x^5
x/3x
10x^4/5x
6x/3x^2
10x^5/15x
4x^3/6x^2
4x^3/10x^4
2/3x^4
2/5x
1/3x^2
2x^3
1/3
2/x
2/3x
2/3x^3
