Problem:
Expand and find the sum $p(x) + q(x)$ of the following two polynomials: $p(x) = \frac{1}{81} (7 x+15)^4, q(x) = \frac{1}{81} (19-11 x)^4$
Answer:
$\frac{17042 x^4}{81}-\frac{80576 x^3}{81}+\frac{109412 x^2}{27}-\frac{207296 x}{81}+\frac{180946}{81}$
{'source': 'AMPS', 'file': 'amps/mathematica/algebra/polynomial_arithmetic/11289.txt'}