求微分dt/(t*lnt)

求微分dt/(t*lnt)
求微分dt/(t*lnt)

求微分dt/(t*lnt)
∫dt/(t*lnt)
=∫dlnt/lnt
=ln|lnt|+C

是积分吧？
∫dt/(t*lnt)
=∫dlnt/(lnt)
=lnlnt+C

数学神马最难了啊