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<b>let </b><font color="Maroon">c<sub>1</sub></font>, <font color="Maroon">c<sub>2</sub></font>, <font color="Maroon">c<sub>3</sub></font> be   <a href="funct_1.html#NM1">Function</a>;<br/>

<b>assume </b><a NAME="E1:81"/><i><font color="Green">E45</font></i>: 
 <a href="relat_1.html#K1">dom</a> <font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a>  <a href="relat_1.html#K1">dom</a> <font color="Maroon">c<sub>3</sub></font>
 ;<br/>

<b>thus </b><span class="p1">(<span class="default"><font color="Maroon">c<sub>1</sub></font> <a href="funct_4.html#K1" target="_self">+*</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="funct_4.html#K1" target="_self">+*</a> <font color="Maroon">c<sub>3</sub></font> = 
<font color="Maroon">c<sub>1</sub></font> <a href="funct_4.html#K1" target="_self">+*</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="funct_4.html#K1" target="_self">+*</a> <font color="Maroon">c<sub>3</sub></font></span>)</span>
<b>by </b><i><a class="ref" href="funct_4.html#T15" target="_self">Th15</a></i>
<br/>.= 
<font color="Maroon">c<sub>1</sub></font> <a href="funct_4.html#K1" target="_self">+*</a> <font color="Maroon">c<sub>3</sub></font>
<b>by </b><i><a class="txt" href="funct_4.html#E1:81"><i><font color="Green">E45</font></i></a>, <a class="ref" href="funct_4.html#T20" target="_self">Th20</a></i>
;<br/>


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