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I have this function t1 = 1; t2 = 2; Umax = 2; u[t_] = (Limit[0.5 + ArcTan[(-(t) - (t1))/x]/Pi, (x -> 0)] + Limit[0.5 + ArcTan[((t) - (t2))/x]/Pi, (x -> 0)])*(Umax) T = 2; Plot[(u[t]), {t, -15, 15}] I...