2.1.1642 Part 1 Section 22.1, Math
a. The standard specifies that the ruby element is allowed inside math.
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Word exhibits unpredictable behavior if the ruby element is included inside math, including failing to open the document.
b. The standard specifies that comments are allowed inside math.
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In Office, unpredictable behavior occurs when comments are included inside math.
c. The standard specifies that the pict element is allowed inside math.
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Word exhibits unpredictable behavior when the pict element is included inside math, including failing to open the document.