Question: Displaying text and math in the MathMLViewer

How would I go about doing this? cat() doesn't seem to work well inside MathML[Export], and I can't think of a way to insert spaces, so text would run up against each other, like findthederivativeofx^2 Right now I'm using a text box above and seperate MathMLViewer below for the symbols, but I would really like to combine them into one. Any ideas? Thanks.
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