fix: math styling

client/styles/main.scss

@@ -234,15 +234,9 @@ hr {
     border-bottom: 2px dotted #555;
 }
 
-.math {
-    max-width: 100%;
-    overflow-x: auto;
-}
-
 @media screen and (min-width: $device-m-width) {
     .math {
         max-width: 100%;
-        overflow-x: auto;
     }
 }