In grad school I started taking all my notes in Sublime with the Unicode-Math mod. I can effortlessly type any unicode characters with "\alias". I've installed that on all my computers since then because it's so easy and convenient.

\int \pi \geq \forall x \underbar \overbar \prime \^2 \therefore \pm \psi \implies \sqrt \2/3 y \approx \Omega

produces

∫π ≥ θ ∀ x̱̅′² ∴ ±ψ ⟹ √⅔y ≈ Ω

I even made my own mod to shorten the aliases of the most commonly used symbols. I long ago gave up trying to memorize all my notes. I can type as fast as I can write and then everything is easy to read and easy to search and instantly synced to cloud without having to transcribe anything after the fact. I had several professors ask me to show them how to set it up.