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!set p_=!word 1 of $wims_read_parm
!bound p_ within none,header,source,html default none
!goto $p_
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!set m_subject=Colorful math formulas
!set m_date=20020414
!set m_time=08:51:44
!set m_from=Gang XIAO
!set m_sender_ip=127.0.0.1
!set m_sender_id=
!set m_sender_class=
!set m_email=xiao@unice.fr
!set m_to=
!set m_prec=O200204/3
!set m_exists=yes
!exit
:source
<pre>
Now you can use colors in your mathematics formulas inserted using TeX:

In the message forum, document or OEF exercises, changing color can only be done via the TeX &lt;tt>\\special{}&lt;/tt> command. For example,
&lt;tt>\\(\\special{color=blue} \\sqrt{x^2+y^2} )&lt;/tt> gives
\(\special{color=blue} \sqrt{x^2+y^2} ). Note that this supposes that you use native TeX syntax for the formula. However, you can produce TeX formula syntax by using the &lt;tt>texmath&lt;/tt> function in a parameter definition, to transform your formula.

For example, you can get complex colorful math
&lt;p>&lt;center>
\def{text  fa=texmath(1/(1-x^2))}
\def{text fb=texmath(1/(2*(1-x)))}
\def{text fc=texmath(1/(2*(1+x)))}
\( \special{color=blue} \fa
\special{color=black} =
\special{color=red} \fb
\special{color=black} +
\special{color=green} \fc
)
&lt;/center>&lt;p>

Color definition can be a common color name (red, orange, magenta, ...), or 3 integers between 0 and 255 indicating the values of red, green, blue. For example, &lt;tt>color=255,0,0&lt;/tt> is equivalent to saying &lt;tt>color=red&lt;/tt>.

In native WIMS modules, you can also use the variable &lt;tt>$instex_color&lt;/tt> to define the TeX color.</pre>
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Now you can use colors in your mathematics formulas inserted using TeX&#58;
<p>
In the message forum, document or OEF exercises, changing color can only be done via the TeX <tt>\special{}</tt> command. For example,
<tt>\(\special{color=blue} \sqrt{x^2+y^2} )</tt> gives

!insmath \special{color=blue} \sqrt{x^2+y^2} 
. Note that this supposes that you use native TeX syntax for the formula. However, you can produce TeX formula syntax by using the <tt>texmath</tt> function in a parameter definition, to transform your formula.
<p>
For example, you can get complex colorful math
<p><center>

!set tmp0=!texmath 1/(1-x^2)

!set m_fa=$(tmp0) 


!set tmp0=!texmath 1/(2*(1-x))

!set m_fb=$(tmp0) 


!set tmp0=!texmath 1/(2*(1+x))

!set m_fc=$(tmp0) 


!insmath  \special{color=blue} \fa \special{color=black} = \special{color=red} \fb \special{color=black} + \special{color=green} \fc 

</center><p>
<p>
Color definition can be a common color name (red, orange, magenta, ...), or 3 integers between 0 and 255 indicating the values of red, green, blue. For example, <tt>color=255,0,0</tt> is equivalent to saying <tt>color=red</tt>.
<p>
In native WIMS modules, you can also use the variable <tt>&#36;instex_color</tt> to define the TeX color.