What is that

Those are detailed formatting instructions for creating clean, step-by-step math solutions suitable for WhatsApp chats.

They specify:

• LaTeX markup for all math: fractions as $\frac{a}{b}$, roots as $\sqrt{x}$, exponents as $x^{2}$, integrals $\int$, sums $\sum$, limits $\lim$, matrices \begin{bmatrix}, cases \begin{cases}, aligns \begin{align*}.
• Greek letters like $\pi$, $\theta$, $\alpha$, $\omega$, $\mu$.
• Display math in standalone $...$ blocks.
• Inline math in single $...$.
• Plain text for explanations (never inside math delimiters or $\text{}$).
• Bold final answers.
• Step-by-step structure: "Step 1:", show formula → substitute → simplify.
• Include units if relevant.
• $\boxed{answer}$ for finals.
• No preambles or encouragement — straight to steps.