The mathastext package propagates the document text font to mathematical mode, for the letters of the Latin alphabet and, optionally, other characters in the font. Thus it makes possible (for a document with simple mathematics) to use a quite arbitrary text font without worrying too much that no specially designed accompanying maths fonts are available. The package also offers a simple mechanism for using many different choices of (text hence, now, maths) font in the same document. Of course, using one font for two purposes helps produce smaller PDF files.