tags and other changes

package.json

@@ -25,8 +25,12 @@
     "react-loading-skeleton": "^3.5.0",
     "react-markdown": "^9.0.1",
     "react-syntax-highlighter": "^15.6.1",
+    "rehype-katex": "^7.0.1",
     "rehype-raw": "^7.0.0",
+    "remark-breaks": "^4.0.0",
+    "remark-footnotes": "^4.0.1",
     "remark-gfm": "^4.0.0",
+    "remark-math": "^6.0.0",
     "typewriter-effect": "^2.21.0"
   },
   "devDependencies": {