How do I use the mathML tag in the text editor

I’ve added these “mi, mrow, msqrt, math, mfrac, munderover, mo, mtd, mtr, mtable, mtext, mmultiscripts” mathml tag to my custom schema list.

These tags are parsed and added in the html content but its styles are not appaplied. The styles for those tags are comes form the browser by default.

I don’t no why the browser default style are not being applied for the mathMl tags