>>> from singular import f

---- inici

>>> round(f(1e-3), 5)
-0.14491
>>> round(f(0.5), 5)
-2.19827
>>> round(f(0.9), 5)
-16.42554
>>> round(f(1), 5)
0
>>> round(f(1.1), 5)
17.55496

---- fi

>>> round(f(2), 5)
-0.88141
>>> round(f(3), 5)
-6.29382
>>> round(f(4), 5)
-6.782
>>> round(f(5), 5)
14.54741
>>> round(f(10), 5)
9131.67807