Alternative Equation Formats

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MathML

f(i:n1,n1,n2,ϕ)=(n1i)(n2n1i) ϕi  /  i=0n1(n1i)(n2n1i) ϕi

MathML rendered with MathJax

f(i:n1,n1,n2,ϕ)=(n1i)(n2n1i) ϕi  /  i=0n1(n1i)(n2n1i) ϕi

Math as LaTeX Source

\[ f( i : n_{\cdot 1}, n_{1 \cdot }, n_{2 \cdot }, \phi ) = \binom {n_{1 \cdot }}{i} \binom {n_{2 \cdot }}{n_{\cdot 1} - i} ~ \phi ^ i ~ ~ / ~ ~ \sum _{i=0}^{n_{\cdot 1}} \binom {n_{1 \cdot }}{i} \binom {n_{2 \cdot }}{n_{\cdot 1}-i} ~ \phi ^ i \]