import numpy as np

M = 60
rho = 1.038
c = 3.7
K = 5.4e-3
Ty = 70
Tw = 100
To = 20

"""
The formula in this case is quite long. It can be written in a single line:
t = ((M ** (2 / 3) * c * rho ** (1 / 3)) / (K * np.pi**2 * (4 * np.pi / 3) ** (2 / 3))) * np.log(0.76 * (To - Tw) / (Ty - Tw))
Such long lines are difficult to read and therefore not recommended. 
Alternatively, it can be split over several lines:
t = (
    (M ** (2 / 3) * c * rho ** (1 / 3)) / (K * np.pi**2 * (4 * np.pi / 3) ** (2 / 3))
) * np.log(0.76 * (To - Tw) / (Ty - Tw))
Note that there are rules to how a line can be split and still understood as a single line
by Python. The expression needs to be split inside a parenthesis, not between.
"""

# But the best solution for long formulas is usually to
# split them up in multiple intermediate calculations:
a = (M ** (2 / 3) * c * rho ** (1 / 3)) / (K * np.pi**2 * (4 * np.pi / 3) ** (2 / 3))
b = np.log(0.76 * (To - Tw) / (Ty - Tw))
t = a * b

# Basic output, time in seconds
print(t)

# Fancier output, using the modulo operator to convert to minutes and seconds:
minutes = int(t / 60)
seconds = int(t % 60)
print(f"Egget er klart etter {minutes} minutter og {seconds} sekunder")

"""
Terminal> python egg.py
292.86116565906764
Egget er klart etter 4 minutter og 52 sekunder
"""