C

n=sqrt(2.6833808-0.012303485*pow(x,2)+0.015614129*pow(x,-2)+0.00047439815*pow(x,-4)-2.7935643e-05*pow(x,-6)+1.5441332e-06*pow(x,-8))

Python

n=(2.6833808-0.012303485*x**2+0.015614129*x**-2+0.00047439815*x**-4-2.7935643e-05*x**-6+1.5441332e-06*x**-8)**.5

Fortran

n=SQRT(2.6833808-0.012303485*x**2+0.015614129*x**-2+0.00047439815*x**-4-2.7935643e-05*x**-6+1.5441332e-06*x**-8)

MATLAB

n=sqrt(2.6833808-0.012303485.*x.^2+0.015614129.*x.^-2+0.00047439815.*x.^-4-2.7935643e-05.*x.^-6+1.5441332e-06.*x.^-8)

LaTeX

n^2=2.6833808-0.012303485λ^{2}+0.015614129λ^{-2}+0.00047439815λ^{-4}-2.7935643\text{×}10^{-05}λ^{-6}+1.5441332\text{×}10^{-06}λ^{-8}