1/4 (i/2. (-Li_2((p t + 1)/(1+i p)) + Li_2((p t + 1)/(1-i p))) + (arctan t - arctan p) ln(p t + 1)) .{-1,1,1,-1} +0.162691813095711-0.27442801457853, where t = {1/3,-1,1/3,-1}, p={3/5,3/5,-1,-1}