>>> from fun_mat_3 import fun_mat_3

>>> round(fun_mat_3(4.2, 4.2), 4)
21.84
>>> round(fun_mat_3(1.0, 0.7), 4)
1.7
>>> round(fun_mat_3(0.9, -11.1), 4)
0.7833
>>> round(fun_mat_3(0.15, 0.0), 4)
0.1494
>>> round(fun_mat_3(-5.5, 4.2), 4)
2.9764
>>> round(fun_mat_3(-0.7, -11.1), 4)
-8.4897