>>> from funcmat import f

>>> a = f(0.0)
>>> print(round(a, 4))
7.0
>>> print(round(f(10.1), 4))
26039.1019
>>> print(round(f(-1.4), 4))
16.9307
>>> print(round(f(6.0), 4))
3253.0
>>> print(round(f(-0.12345), 4))
7.0031