#javob_algo_Phyton_077 Obunachilarimizdan..! from math import | Kʜ | DASTURLASH !!!
#javob_algo_Phyton_077 Obunachilarimizdan..!
from math import * a,b,c,d=map(int,input().split()) y=0 for x in range(c,d+1,2): y=y+pow(((sin(a*x)+pow(b,2*c))/(b*b+cos(x)**2)),1/3)-sin(x**2)/(a*b) print(f'{y:.2f}')
