Problem:
Find $x-y$ where $x=-\frac{26}{7}-\frac{13 i}{7}$ and $y=-\frac{57}{7}-\frac{3 i}{7}$
Answer:
$\frac{31}{7}-\frac{10 i}{7}$
{'source': 'AMPS', 'file': 'amps/mathematica/algebra/complex_arithmetic/16408.txt'}