diff --git a/README.md b/README.md
index 8740559..1a2ad91 100644
--- a/README.md
+++ b/README.md
@@ -2,11 +2,19 @@
 $$\left. \frac{{\rm d}u}{{\rm d}x} \right| _{x=0}$$
 
 $$
-\begin{array}{c | c}
-\mathrm{Bad} & \mathrm{Better} \\\\
-\hline \\\\
-\int_0^1 x^2 dx & \int_0^1 x^2 \\,{\rm d}x
-\end{array}
+f\left(
+   \left[ 
+     \frac{
+       1+\left\\{x,y\right\\}
+     }{
+       \left(
+          \frac xy + \frac yx
+       \right)
+       (u+1)
+     }+a
+   \right]^{3/2}
+\right)
+\tag {行标}
 $$
 
 基于 Android WebView 的多窗口浏览器，支持收藏夹、图片广告过滤、视频独立播放、资源探查。