Note: After saving, you have to bypass your browser's cache to see the changes. Google Chrome, Firefox, Microsoft Edge and Safari: Hold down the ⇧ Shift key and click the Reload toolbar button. For details and instructions about other browsers, see Wikipedia:Bypass your cache.
.mw-special-Watchlist .mw-rollback-link {
    display: none;
}
.qxz-ads { display: none !important; }

.mw-changeslist-ns5-Requests_for_adminship { display: none; }