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clear;clc;close all;
syms x t;
k=[-50:50];
fx=0;
for i=1:length(k)
    a=k(i);
    fx=fx+cos(pi*a/8)*sin(x-a)/(pi*(x-a))/(1+abs(a));                      %¹«Ê½ÖеÄf£¨x£©±í´ïʽ£¡
end
fx=simple(fx);                                                             %»¯¼ò£¡
F=int(fx*exp(x-t),x,-inf,t);                                         %Çó³ö¶¨»ý·Ö×ó±ßµÄ±í´ïʽ£¡

tt=solve('F-0.02','t');
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