Here is a test to see abilities when dealing with equations such as $y=X\beta$ handles
Or single line
$$y=X\beta$$
And a more complex formula
$$\frac{a}{(\sum_{n}^{i=1}{x_i+1})+k}$$
Results:
2014-07-17
Copy-paste OK for the simple formulas but nothing else
Complete failure for opening directly in LibreOffice/Word
With word_document - works perfectly
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