我有文字
some words <span class="english">some english words</span> some words and more words<br> some more words and more words<p>more words</p><span>more words</span>
我想删除所有标签，除了其中的内容以及
结果必须是
some words <span class="english">some English words</span> some words and more words<br> some more words and more words more words more words
我使用正则表达式<.*?>删除了所有标签。如何保留<br>和<span class="english"></span>