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<h3>When I enter<KBD> 3xy </KBD>the number 3 comes out in italics. Is this a bug?</h3>
<P>Not really. What happens here is, that Math uses multi-letter
variables, which are common in some disciplines, like economy. The
rule is that a variable consists of a sequence of letters, numbers
and dots (the first character can not be a dot).</P>
<P>So when you enter 3xy this is considered a variable - and
variables are typeset in italics. The only odd thing here is, that a
variable can start with a number.</P>
<P>The correct way to enter the expression if you mean 3 times x
times y is<KBD> 3 x y </KBD>(with spaces between the characters).</P>
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