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<b>thus </b><a NAME="E1:49_1_1"/>
 <a href="eqrel_1.html#K7" target="_self">Class</a> <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>3</sub></font> is    <a href="subset_1.html#M2">Element</a> of  <a href="eqrel_1.html#K9" target="_self">Class</a> <font color="Maroon">c<sub>2</sub></font>
 <b>by </b><i><a class="ref" href="eqrel_1.html#D5" target="_self">Def5</a></i>;<br/>


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