Problem:
Find the greatest common divisor of $-\frac{56 x^4}{9}+\frac{28 x^3}{9}-\frac{14 x^2}{9}+\frac{70 x}{9}-\frac{98}{9}$ and $\frac{4 x^4}{3}-\frac{2 x^3}{3}+\frac{x^2}{3}-\frac{5 x}{3}+\frac{7}{3}$.
Answer:
$\frac{4 x^4}{9}-\frac{2 x^3}{9}+\frac{x^2}{9}-\frac{5 x}{9}+\frac{7}{9}$
{'source': 'AMPS', 'file': 'amps/mathematica/algebra/polynomial_gcd/16266.txt'}