import math
print math.pi, math.e # Common constants
print math.sin(2 * math.pi / 180) # Sine, tangent, cosine
print math.sqrt(144), math.sqrt(2) # Square root
print abs(-42), 2**4, pow(2, 4)
print int(2.567), round(2.567), round(2.567, 2) # Truncate, round