var L,x,y,a,b,d: real;
begin
write('x = ');
readln(x);
write('y = ');
readln(y);
write('a = ');
readln(a);
write('b = ');
readln(b);
write('d = ');
readln(d);
L:= (exp(ln(sin(exp(ln((a*pi-y))*8)))*13))/(17.84 + exp(ln(x)*5*(a-b))) - exp(ln((pi/7 + d))*9);
writeln('L = ',L:0:4)
end.
