7-1 jmu-python-分段函数&数学函数 (15分)

from math import *

x =eval(input())
y = 0
if abs(x) < 1:
    y = sqrt(2-2*x)
elif x >= 1:
    y = (cos(x)+pow(x,2)) / (2.5+abs(x+log(100)))
else:
    y = exp(x)

print('f({:.3f})={:.3f}'.format(x,y))