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隨文數式(inline mode)用 $ $, 展式數式(display mode) 用 \[ \]範例:
- 方程式 $ ax^2 + bx + c =0 $ 的公式解為 $ x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}$
- \[\sum_{k=0}^{n} \binom{n}{k} = 2^n
\]