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Lorem ipsum dolor sit amet, consectetur adipiscing elit. In imperdiet bibendum eleifend. Fusce in nulla ex. Nam leo nisi, ultricies at ante id, iaculis sodales mauris. Donec ullamcorper pharetra lacinia. Quisque et sem mi. Duis ac semper lorem, et p

行内公式\\(...\\)方式，\\(x = a * \frac{b^2+c_1^2}{2}\\)，输出效果 \\(x = a * \frac{b^2+c_1^2}{2}\\) 行内公式$...$方式，$\alpha+\beta=\gamma$，输出效果 $\alpha+\beta=\gamma$ 段落方式$$...$$,$$ x = a * \frac{b^2+c_1^2}{2}$$，输出效果 $$ x = a * \frac{b^2+c_1^2}{2}$$