1/2*ln(x^2+1)-4*ln1/2-1/2*(ln(x-4)+lnx) =ln((x^2+1)^(1/2))-ln(1/2)^4-[1/2ln(x-4)+1/2lnx]=ln(根号(x^2+1))-ln1/16-[ln(根号(x-4))+ln根号x]=ln[根号(x^2+1)/(1/16)]-ln[根号(x-4)*根号x]=ln[16根号(x^2+1)]-ln...