How do you mean to make the word mathematics an art word? You can click Insert directly in the document and select your favorite wordart.

Take Word20 19 as an example, the operation steps are as follows:

1, open the Word document, select the word "Math" and click "Insert" above, then find the artistic word and click to choose your favorite style;

2. You can also click Insert-WordArt after opening the Word document, then select your favorite WordArt style, and then enter the math.