<svg xmlns="http://www.w3.org/2000/svg" xmlns:wrs="http://www.wiris.com/xml/mathml-extension" height="47" width="140" wrs:baseline="26"><!--MathML: <math xmlns="http://www.w3.org/1998/Math/MathML"><mfrac><mrow><mi>d</mi><mi>P</mi></mrow><mrow><mi>d</mi><mi>T</mi></mrow></mfrac><mo>=</mo><mfrac><mi>T</mi><mrow><mi>L</mi><mi>T</mi><mfenced separators="|"><mrow><msub><mi>V</mi><mn>2</mn></msub><mo>-</mo><msub><mi>V</mi><mn>1</mn></msub></mrow></mfenced></mrow></mfrac></math>--><defs><style type="text/css">@font-face{font-family:'math143f4d31b04031e49f5eb18baba';src:url(data:font/truetype;charset=utf-8;base64,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)format('truetype');font-weight:normal;font-style:normal;}@font-face{font-family:'round_brackets22549f92a457f2409';src:url(data:font/truetype;charset=utf-8;base64,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)format('truetype');font-weight:normal;font-style:normal;}</style></defs><line stroke="#000000" stroke-linecap="square" stroke-width="1" x1="2.5" x2="26.5" y1="20.5" y2="20.5"/><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="8.5" y="15">d</text><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="18.5" y="15">P</text><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="9.5" y="37">d</text><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="19.5" y="37">T</text><text font-family="math143f4d31b04031e49f5eb18baba" font-size="16" text-anchor="middle" x="37.5" y="26">=</text><line stroke="#000000" stroke-linecap="square" stroke-width="1" x1="48.5" x2="136.5" y1="20.5" y2="20.5"/><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="92.5" y="15">T</text><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="54.5" y="38">L</text><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="64.5" y="38">T</text><text font-family="round_brackets22549f92a457f2409" font-size="16" text-anchor="middle" x="73.5" y="41">(</text><text font-family="round_brackets22549f92a457f2409" font-size="16" text-anchor="middle" x="131.5" y="41">)</text><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="81.5" y="38">V</text><text font-family="Arial" font-size="12" text-anchor="middle" x="91.5" y="43">2</text><text font-family="math143f4d31b04031e49f5eb18baba" font-size="16" text-anchor="middle" x="102.5" y="38">&#x2212;</text><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="115.5" y="38">V</text><text font-family="Arial" font-size="12" text-anchor="middle" x="125.5" y="43">1</text></svg>