       <td>&#x2212;x <!-- U+2212: MINUS SIGN -->
        <td>&#x2219;x <!-- U+2219: BULLET OPERATOR -->
        <td>&#x221A;x <!-- U+221A: SQUARE ROOT -->
        <td>&#x221E;x <!-- U+221E: INFINITY -->
        <td>&#x222B;x <!-- U+222B: INTEGRAL -->
        <td>&#x2248;x <!-- U+2248: ALMOST EQUAL TO -->
        <td>&#x2260;x <!-- U+2260: NOT EQUAL TO -->
        <td>&#x2264;x <!-- U+2264: LESS-THAN OR EQUAL TO -->
        <td>&#x2265;x <!-- U+2265: GREATER-THAN OR EQUAL TO -->
        <td>&#x22F2;x <!-- U+