mml=<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>&#x2013;</mo><mo>[</mo><mfenced open="{" close="]" separators="|"><mrow><msqrt><mn>169</mn></msqrt><mo>-</mo><msqrt><mn>49</mn></msqrt><mo>}</mo><mo>&#xD7;</mo><mo>-</mo><mn>2</mn><mo>.5</mo></mrow></mfenced><mo>?</mo><mo>[</mo><mn>0</mn><mo>.4</mo><mo>&#xD7;</mo><mfenced separators="|"><mrow><mn>4</mn><mo>.2</mo><mo>&#xF7;</mo><mn>1</mn><mo>.5</mo></mrow></mfenced><mo>]</mo><mspace linebreak="newline"/><mo>-</mo><mfenced open="[" close="]" separators="|"><mrow><mfenced open="{" close="}" separators="|"><mrow><mn>13</mn><mo>-</mo><mn>7</mn></mrow></mfenced><mo>&#xD7;</mo><mo>-</mo><mn>2</mn><mo>.5</mo></mrow></mfenced><mo>?</mo><mfenced open="[" close="]" separators="|"><mrow><mn>0</mn><mo>.4</mo><mo>&#xD7;</mo><mn>28</mn></mrow></mfenced><mspace linebreak="newline"/></math>