C

n=sqrt(1+0.400/(1-pow(0.071/x,2))+0.220/(1-pow(0.134/x,2)))

Python

n=(1+0.400/(1-(0.071/x)**2)+0.220/(1-(0.134/x)**2))**.5

Fortran

n=SQRT(1+0.400/(1-(0.071/x)**2)+0.220/(1-(0.134/x)**2))

MATLAB

n=sqrt(1+0.400./(1-(0.071./x).^2)+0.220./(1-(0.134./x).^2))

LaTeX

n^2-1=\frac{0.400λ^2}{λ^2-0.071^2}+\frac{0.220λ^2}{λ^2-0.134^2}