t-align:center;">&#128522;</td>
      <td style="text-align:left;">$a^*b$ with $a^*$</td>
      <td style="text-align:left;"><p><eq><span class="katex"><span class="katex-mathml"><math><semantics><mrow><msup><mi>a</mi><mo>∗</mo></msup><mi>b</mi></mrow><annotation encoding="application/x-tex">a^*b</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="strut" style="height:0.69444em;"></span><span class="strut bottom" style="height:0.69444em;vertical-align:0em;"></spa