2 <mrow helm:xref="SELECTION OK">
4 <mo>⁡</mo>
9 <mo>⁢</mo>
23 <mo>⁢</mo>
31 <mo fontstyle="italic">d</mo>
36 <mfrac><mi>a</mi><mn>2</mn></mfrac>
37 <mo>⁢</mo>
40 <mo>⁡</mo>
44 <msup><mi>x</mi><mn>2</mn></msup>
48 <mo>⁢</mo>
64 <mo>⁢</mo>
70 <mo>⁢</mo>
78 <mo>⁢</mo>
89 <mo>⁢</mo>
91 <mi xlink:href="JUMPS WORK">arctg</mi>
92 <mo>⁡</mo>
97 <mo>⁢</mo>
107 <mo>⁢</mo>