C

n=sqrt(2.780948-0.0236625*pow(x,2)+0.008676537*pow(x,-2)+0.00294181*pow(x,-4)-0.0003515541*pow(x,-6)+1.844065e-05*pow(x,-8))

Python

n=(2.780948-0.0236625*x**2+0.008676537*x**-2+0.00294181*x**-4-0.0003515541*x**-6+1.844065e-05*x**-8)**.5

Fortran

n=SQRT(2.780948-0.0236625*x**2+0.008676537*x**-2+0.00294181*x**-4-0.0003515541*x**-6+1.844065e-05*x**-8)

MATLAB

n=sqrt(2.780948-0.0236625.*x.^2+0.008676537.*x.^-2+0.00294181.*x.^-4-0.0003515541.*x.^-6+1.844065e-05.*x.^-8)

LaTeX

n^2=2.780948-0.0236625λ^{2}+0.008676537λ^{-2}+0.00294181λ^{-4}-0.0003515541λ^{-6}+1.844065\text{×}10^{-05}λ^{-8}