Show math in html block in editing mode please,and make html easy to edit

Feature requests
1

1 Html block in editing mode:

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image900×436 67.2 KB

versus html block in reading mode:
image
image899×402 59.5 KB

2 If I want to edit it,It is very difficult.How about providing a WYSIWYG function for html block?
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image919×724 173 KB