exports[`A MathML builder \\multicolumn sets columnspan and columnalign on <mtd> 1`] = `
<math xmlns="http://www.w3.org/1998/Math/MathML">
  <semantics>
    <mrow>
      <mo fence="true">
        (
      </mo>
      <mtable rowspacing="0.16em"
              columnalign="center center"
              columnspacing="1em"
      >
        <mtr>
          <mtd columnspan="2"
               columnalign="center"
          >
            <mstyle scriptlevel="0"
                    displaystyle="false"
            >
              <mi>
                x
              </mi>
            </mstyle>
          </mtd>
        </mtr>
        <mtr>
          <mtd>
            <mstyle scriptlevel="0"
                    displaystyle="false"
            >
              <mi>
                a
              </mi>
            </mstyle>
          </mtd>
          <mtd>
            <mstyle scriptlevel="0"
                    displaystyle="false"
            >
              <mi>
                b
