Problem:
Compute the following expression: $\sum_{k=0}^14 -\frac{28}{15}\frac{1}{32}^k$
Answer:
$-\frac{8530726549700004256999}{4427218577690292387840}$
{'source': 'AMPS', 'file': 'amps/mathematica/algebra/geometric_series/48488.txt'}