a href="reference/add_equation.html">add_equation</a></span><span class="op">(</span><span class="st">"G_s = G_d"</span><span class="op">)</span> <span class="op">|&gt;</span> </span>
<span>  <span class="fu"><a href="reference/add_equation.html">add_equation</a></span><span class="op">(</span><span class="st">"T_s = T_d"</span><span class="op">)</span> <span class="op">|&gt;</span> </span>
<span>  <span class="fu"><a href="reference/add_equation.html">add_equation</a></span><span class="op">(</span><span c