feat: add 5 new blog posts (en + zh)

- how-ai-reads-math: plain-English explainer of the recognition pipeline
- student-workflow: lecture-to-LaTeX workflow for students
- pdf-formula-issues: troubleshooting guide for PDF extraction errors
- copy-math-to-word: 3 methods for getting formulas into Word, ranked
- researcher-workflow: digitizing handwritten research notes at scale

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

content/blog/en/2026-02-01-student-workflow.md

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+---
+title: "From Whiteboard to LaTeX in 3 Seconds: A Student's Workflow"
+description: How students use TexPixel to turn lecture notes and homework into clean digital documents without retyping a single formula
+slug: student-workflow
+date: 2026-02-01
+tags: [tutorial, workflow, students]
+---
+
+# From Whiteboard to LaTeX in 3 Seconds: A Student's Workflow
+
+If you've ever spent 20 minutes wrestling with `\underbrace`, `\overset`, or a nested fraction in LaTeX just to transcribe something your professor wrote in 10 seconds on a whiteboard — this workflow is for you.
+
+## The Problem With Retyping
+
+Retyping formulas by hand is slow, error-prone, and interrupts the flow of note-taking. A single misplaced brace breaks compilation. A wrong symbol — `\mu` instead of `\upsilon`, say — can change the meaning entirely. And some constructs, like large piecewise functions or multi-line aligned systems, take real LaTeX expertise to format correctly.
+
+TexPixel removes all of this friction.
+
+## The Workflow
+
+### During the Lecture
+
+Photograph each formula as it appears on the board. Don't worry about perfect framing — a quick phone shot is fine. A 150+ DPI photo taken under decent lighting gives TexPixel everything it needs.
+
+You don't have to process anything during class. Just build up a folder of photos.
+
+### After Class
+
+1. Open TexPixel. Drag and drop the first photo.
+2. In under a second, you get LaTeX output — paste it directly into your Overleaf document or VS Code `.tex` file.
+3. Repeat for each formula.
+
+For a typical lecture with 10–15 formulas, this takes about 2 minutes. Compare that to 20–30 minutes of manual retyping.
+
+### For Homework
+
+When working through problem sets:
+
+1. Solve the problem on paper as you normally would.
+2. Take a photo of your work.
+3. Upload to TexPixel to extract the key formulas.
+4. Paste into your write-up.
+
+This is especially useful for multi-step derivations where you want to show your work digitally.
+
+## Exporting to Word
+
+Not using LaTeX? If your professor requires Word submissions, use TexPixel's DOCX export. It produces native Word equations — not images — so you can still edit them in Word's equation editor after exporting.
+
+## A Real Example
+
+Here's a typical formula from a linear algebra lecture:
+
+$$A = U \Sigma V^T$$
+
+Manual LaTeX: `A = U \Sigma V^T` — straightforward, but you need to know `\Sigma` and `V^T`.
+
+With TexPixel: photograph it, get `A = U \Sigma V^T` in one second, paste. For more complex expressions — a full SVD decomposition with summation notation and indexed entries — the time savings are even more dramatic.
+
+## Tips for Lecture Photography
+
+- **Position yourself centrally** — formulas at the edges of the board get distorted by perspective
+- **Wait for the professor to finish writing** — partial formulas confuse the parser
+- **Avoid flash** — it creates glare and washes out chalk or whiteboard markers
+- **Crop if needed** — if a photo contains multiple formulas, crop before uploading
+
+## Building a Formula Library
+
+Over a semester, you'll accumulate dozens of recognized formulas. Consider organizing them: paste each into a reference `.tex` file with a short comment. By exam time, you'll have a searchable personal formula sheet that took almost no effort to build.
+
+[Start digitizing your notes →](/app)