letex使用方法

letex下載地址   www.ctex.org  letex IEEE模板下載地址    http://www.ieee.org/publications_standards/publications/authors/author_templates.html  $x=\frac{1+y}{1+2z^2}$ (inline) $$x=\frac{1+y}{1+2z^2}$$ (displayed

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