1. The user asked about writing equations. 2. To write equations, use LaTeX syntax with dollar signs $...$ for inline math or double dollar signs $$...$$ for display math. 3. For example, to write the quadratic formula, use $$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$$. 4. This allows clear and precise mathematical expressions. 5. If you want to write any specific equation, just type it using LaTeX syntax inside dollar signs.