C

n=sqrt(2.56216381-0.0130775362*pow(x,2)+0.0181084716*pow(x,-2)+0.00231573055*pow(x,-4)-0.000264961402*pow(x,-6)+2.07458046e-05*pow(x,-8))

Python

n=(2.56216381-0.0130775362*x**2+0.0181084716*x**-2+0.00231573055*x**-4-0.000264961402*x**-6+2.07458046e-05*x**-8)**.5

Fortran

n=SQRT(2.56216381-0.0130775362*x**2+0.0181084716*x**-2+0.00231573055*x**-4-0.000264961402*x**-6+2.07458046e-05*x**-8)

MATLAB

n=sqrt(2.56216381-0.0130775362.*x.^2+0.0181084716.*x.^-2+0.00231573055.*x.^-4-0.000264961402.*x.^-6+2.07458046e-05.*x.^-8)

LaTeX

n^2=2.56216381-0.0130775362λ^{2}+0.0181084716λ^{-2}+0.00231573055λ^{-4}-0.000264961402λ^{-6}+2.07458046\text{×}10^{-05}λ^{-8}