<svg xmlns="http://www.w3.org/2000/svg" xmlns:wrs="http://www.wiris.com/xml/mathml-extension" height="41" width="114" wrs:baseline="26"><!--MathML: <math xmlns="http://www.w3.org/1998/Math/MathML"><mfrac><mi mathvariant="normal">b</mi><mi mathvariant="normal">c</mi></mfrac><mo>+</mo><mn>1</mn><mo>=</mo><mfrac><mi>DC</mi><mi>BD</mi></mfrac><mo>+</mo><mn>1</mn></math>--><defs><style type="text/css">@font-face{font-family:'math12ed72e0d2d50af08c235c494fe';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="14.5" y1="20.5" y2="20.5"/><text font-family="Arial" font-size="16" text-anchor="middle" x="8.5" y="15">b</text><text font-family="Arial" font-size="16" text-anchor="middle" x="9.5" y="37">c</text><text font-family="math12ed72e0d2d50af08c235c494fe" font-size="16" text-anchor="middle" x="24.5" y="26">+</text><text font-family="Arial" font-size="16" text-anchor="middle" x="36.5" y="26">1</text><text font-family="math12ed72e0d2d50af08c235c494fe" font-size="16" text-anchor="middle" x="49.5" y="26">=</text><line stroke="#000000" stroke-linecap="square" stroke-width="1" x1="60.5" x2="86.5" y1="20.5" y2="20.5"/><text font-family="Arial" font-size="16" text-anchor="middle" x="73.5" y="15">DC</text><text font-family="Arial" font-size="16" text-anchor="middle" x="74.5" y="37">BD</text><text font-family="math12ed72e0d2d50af08c235c494fe" font-size="16" text-anchor="middle" x="96.5" y="26">+</text><text font-family="Arial" font-size="16" text-anchor="middle" x="108.5" y="26">1</text></svg>