Day 153 — 2026 MIT Integration Bee Qualifying (Q19) 365 Problems for 365 Days Today’s problem is a nested logarithm integration question that shows up a lot in AP Calculus and contest math: you’re looking for the “perfect substitution” hidden in the denominator xlog(x). If you choose the right u-sub, the integral turns into a clean integration-by-parts problem with ulog(u). Problem: Integral of [ log(log x) * log(log(log x)) ] / [ x * log x ] dx High-yield hint: \t•\tIf you see dx/(x log x), thi