 <span class="op">=</span> <span class="nam">x0</span> <span class="op">+</span> <span class="op">(</span><span class="nam">r</span> <span class="key">if</span> <span class="nam">c0_exposed</span> <span class="key">else</span> <span class="num">0</span><span class="op">)</span>&nbsp;</span><span class="r"></span></p>
    <p class="mis show_mis"><span class="n"><a id="t80" href="#t80">80</a></span><span class="t">        <span class="nam">start_y</span> <span class="op">=</span> <span class="nam">y0</span>&n