SVG before and after applying compound path in Illustrator for http://graphicdesign.stackexchange.com/questions/82491/how-to-convert-a-circle-to-a-path/82508

1. before.svg

2. after.svg

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 612 157.41935">
  <defs>
    <style>
      .a {
        fill: #ed2024;
      }

      .b {
        fill: none;
        stroke: #ed2024;
        stroke-miterlimit: 10;
        stroke-width: 40px;
      }
    </style>
  </defs>
  <title>after</title>
  <path class="a" d="M100,100H0V0H100Z"/>
  <path class="a" d="M215.54853,100h-76a12.03528,12.03528,0,0,1-12-12V12a12.03528,12.03528,0,0,1,12-12h76a12.03528,12.03528,0,0,1,12,12V88A12.03528,12.03528,0,0,1,215.54853,100Z"/>
  <path class="a" d="M355.09706,50a50,50,0,1,1-50-50A50,50,0,0,1,355.09706,50Z"/>
  <path class="a" d="M482.6456,50l-25,43.30127h-50L382.6456,50l25-43.30127h50Z"/>
  <path class="a" d="M560.19413,12.16931,592.21192.8l-.93427,33.92058L612,61.61455l-32.5952,9.59476L560.19413,99.2,540.98346,71.20931l-32.5952-9.59476,20.72235-26.894L528.17634.8Z"/>
  <path class="b" d="M0,137.41935H612"/>
</svg>