The Perl Toolchain Summit 2025 Needs You: You can help ๐Ÿ™ Learn more

<?xml version="1.0" encoding="UTF-8"?>
<?latexml class="article"?>
<?latexml RelaxNGSchema="LaTeXML"?>
<document xmlns="http://dlmf.nist.gov/LaTeXML">
<resource src="LaTeXML.css" type="text/css"/>
<resource src="ltx-article.css" type="text/css"/>
<section inlist="toc" xml:id="S1">
<tags>
<tag>1</tag>
<tag role="refnum">1</tag>
<tag role="typerefnum">ยง1</tag>
</tags>
<title><tag close=" ">1</tag>Testing Choose</title>
<para xml:id="S1.p1">
<p>beep hello, BEEP. beep.</p>
</para>
<para xml:id="S1.p2">
<p>1. <Math mode="inline" tex="a+b" text="a + b" xml:id="S1.p2.m1">
<XMath>
<XMApp>
<XMTok meaning="plus" role="ADDOP">+</XMTok>
<XMTok font="italic" role="UNKNOWN">a</XMTok>
<XMTok font="italic" role="UNKNOWN">b</XMTok>
</XMApp>
</XMath>
</Math></p>
</para>
<para xml:id="S1.p3">
<p>2. <Math mode="inline" tex="a\choose b" text="a binomial b" xml:id="S1.p3.m1">
<XMath>
<XMDual>
<XMApp>
<XMRef idref="S1.p3.m1.1"/>
<XMRef idref="S1.p3.m1.2"/>
<XMRef idref="S1.p3.m1.3"/>
</XMApp>
<XMWrap>
<XMTok role="OPEN" stretchy="true">(</XMTok>
<XMApp xml:id="S1.p3.m1.4">
<XMTok mathstyle="text" meaning="binomial" role="FRACOP" thickness="0pt" xml:id="S1.p3.m1.1"/>
<XMTok font="italic" fontsize="70%" role="UNKNOWN" xml:id="S1.p3.m1.2">a</XMTok>
<XMTok font="italic" fontsize="70%" role="UNKNOWN" xml:id="S1.p3.m1.3">b</XMTok>
</XMApp>
<XMTok role="CLOSE" stretchy="true">)</XMTok>
</XMWrap>
</XMDual>
</XMath>
</Math></p>
</para>
<para xml:id="S1.p4">
<p>3. <Math mode="inline" tex="a+{b\choose c}+d" text="a + b binomial c + d" xml:id="S1.p4.m1">
<XMath>
<XMApp>
<XMTok meaning="plus" role="ADDOP">+</XMTok>
<XMTok font="italic" role="UNKNOWN">a</XMTok>
<XMDual>
<XMApp>
<XMRef idref="S1.p4.m1.1"/>
<XMRef idref="S1.p4.m1.2"/>
<XMRef idref="S1.p4.m1.3"/>
</XMApp>
<XMWrap>
<XMTok role="OPEN" stretchy="true">(</XMTok>
<XMApp xml:id="S1.p4.m1.4">
<XMTok mathstyle="text" meaning="binomial" role="FRACOP" thickness="0pt" xml:id="S1.p4.m1.1"/>
<XMTok font="italic" fontsize="70%" role="UNKNOWN" xml:id="S1.p4.m1.2">b</XMTok>
<XMTok font="italic" fontsize="70%" role="UNKNOWN" xml:id="S1.p4.m1.3">c</XMTok>
</XMApp>
<XMTok role="CLOSE" stretchy="true">)</XMTok>
</XMWrap>
</XMDual>
<XMTok font="italic" role="UNKNOWN">d</XMTok>
</XMApp>
</XMath>
</Math></p>
</para>
<para xml:id="S1.p5">
<p>4. <Math mode="inline" tex="a+{b\choose c}+d" text="a + b binomial c + d" xml:id="S1.p5.m1">
<XMath>
<XMApp>
<XMTok meaning="plus" role="ADDOP">+</XMTok>
<XMTok font="italic" role="UNKNOWN">a</XMTok>
<XMDual>
<XMApp>
<XMRef idref="S1.p5.m1.1"/>
<XMRef idref="S1.p5.m1.2"/>
<XMRef idref="S1.p5.m1.3"/>
</XMApp>
<XMWrap>
<XMTok role="OPEN" stretchy="true">(</XMTok>
<XMApp xml:id="S1.p5.m1.4">
<XMTok mathstyle="text" meaning="binomial" role="FRACOP" thickness="0pt" xml:id="S1.p5.m1.1"/>
<XMTok font="italic" fontsize="70%" role="UNKNOWN" xml:id="S1.p5.m1.2">b</XMTok>
<XMTok font="italic" fontsize="70%" role="UNKNOWN" xml:id="S1.p5.m1.3">c</XMTok>
</XMApp>
<XMTok role="CLOSE" stretchy="true">)</XMTok>
</XMWrap>
</XMDual>
<XMTok font="italic" role="UNKNOWN">d</XMTok>
</XMApp>
</XMath>
</Math></p>
</para>
<para xml:id="S1.p6">
<p>5. <Math mode="inline" tex="a+{b\choose c}+d" text="a + b binomial c + d" xml:id="S1.p6.m1">
<XMath>
<XMApp>
<XMTok meaning="plus" role="ADDOP">+</XMTok>
<XMTok font="italic" role="UNKNOWN">a</XMTok>
<XMDual>
<XMApp>
<XMRef idref="S1.p6.m1.1"/>
<XMRef idref="S1.p6.m1.2"/>
<XMRef idref="S1.p6.m1.3"/>
</XMApp>
<XMWrap>
<XMTok role="OPEN" stretchy="true">(</XMTok>
<XMApp xml:id="S1.p6.m1.4">
<XMTok mathstyle="text" meaning="binomial" role="FRACOP" thickness="0pt" xml:id="S1.p6.m1.1"/>
<XMTok font="italic" fontsize="70%" role="UNKNOWN" xml:id="S1.p6.m1.2">b</XMTok>
<XMTok font="italic" fontsize="70%" role="UNKNOWN" xml:id="S1.p6.m1.3">c</XMTok>
</XMApp>
<XMTok role="CLOSE" stretchy="true">)</XMTok>
</XMWrap>
</XMDual>
<XMTok font="italic" role="UNKNOWN">d</XMTok>
</XMApp>
</XMath>
</Math></p>
</para>
<para xml:id="S1.p7">
<p>6. <Math mode="inline" tex="a+b\choose c+d" text="(a + b) binomial (c + d)" xml:id="S1.p7.m1">
<XMath>
<XMDual>
<XMApp>
<XMRef idref="S1.p7.m1.1"/>
<XMRef idref="S1.p7.m1.2"/>
<XMRef idref="S1.p7.m1.3"/>
</XMApp>
<XMWrap>
<XMTok role="OPEN" stretchy="true">(</XMTok>
<XMApp xml:id="S1.p7.m1.4">
<XMTok mathstyle="text" meaning="binomial" role="FRACOP" thickness="0pt" xml:id="S1.p7.m1.1"/>
<XMApp xml:id="S1.p7.m1.2">
<XMTok fontsize="70%" meaning="plus" role="ADDOP">+</XMTok>
<XMTok font="italic" fontsize="70%" role="UNKNOWN">a</XMTok>
<XMTok font="italic" fontsize="70%" role="UNKNOWN">b</XMTok>
</XMApp>
<XMApp xml:id="S1.p7.m1.3">
<XMTok meaning="plus" role="ADDOP">+</XMTok>
<XMTok font="italic" fontsize="70%" role="UNKNOWN">c</XMTok>
<XMTok font="italic" role="UNKNOWN">d</XMTok>
</XMApp>
</XMApp>
<XMTok role="CLOSE" stretchy="true">)</XMTok>
</XMWrap>
</XMDual>
</XMath>
</Math></p>
</para>
</section>
</document>