C

n=sqrt(1+0.99654/(1-0.00787/pow(x,2))+0.18964/(1-0.02191/pow(x,2))+0.00411/(1-3.85727/pow(x,2)))

Python

n=(1+0.99654/(1-0.00787/x**2)+0.18964/(1-0.02191/x**2)+0.00411/(1-3.85727/x**2))**.5

Fortran

n=SQRT(1+0.99654/(1-0.00787/x**2)+0.18964/(1-0.02191/x**2)+0.00411/(1-3.85727/x**2))

MATLAB

n=sqrt(1+0.99654./(1-0.00787./x.^2)+0.18964./(1-0.02191./x.^2)+0.00411./(1-3.85727./x.^2))

LaTeX

n^2-1=\frac{0.99654λ^2}{λ^2-0.00787}+\frac{0.18964λ^2}{λ^2-0.02191}+\frac{0.00411λ^2}{λ^2-3.85727}