In Jingyiu.com, there are two formats for math scores and root signs. One is realized in html. If you copy it into word, it will be like you said. There is also a mathplayer plug-in format, and the grammar is written in latex format. When copied into word, it is plain text, such as {frac}{ 1}{2}, which cannot be converted into decimal form correctly in word for the time being. Moreover, html supports markup languages such as xml, which is different from the formula of word itself. Unless there is a converter, you can't meet your requirements.

There is a software called Math Tool, which has the function of transforming formulas. You can try.