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t_pm=5
n=3000
i=1:3000
j=1:3000
T_pf=15
c_1=200
c_2=4000
c_3=5000
syms t_i_j
f=sym(1-exp(-(t_i_j/21548)^1.75))
g=sym(finverse(f))
b=rand(1,1)
g=sym(g)
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