data/mathtoweb/245.mml
<math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi>F</mi><mrow><mi>n</mi><mo>+</mo><mn>1</mn></mrow></msub><mo>=</mo><mstyle displaystyle="true"><munder><mo>∑</mo><mrow><mi>k</mi><mo>≤</mo><mi>n</mi></mrow></munder></mstyle><mrow><mo rspace="0em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><mfrac linethickness="0"><mrow><mi>n</mi><mo>-</mo><mi>k</mi></mrow><mi>k</mi></mfrac><mo rspace="0em" lspace="0em" stretchy="true" fence="true" form="postfix">)</mo></mrow><mo>,</mo><mspace width="1.00em" /><mi>n</mi><mo>≥</mo><mn>0</mn></mrow></math>