C

n=sqrt(2.6590501-0.011944106*pow(x,2)+0.02185629*pow(x,-2)+0.0011761807*pow(x,-4)-7.8567029e-05*pow(x,-6)+8.1413835e-06*pow(x,-8))

Python

n=(2.6590501-0.011944106*x**2+0.02185629*x**-2+0.0011761807*x**-4-7.8567029e-05*x**-6+8.1413835e-06*x**-8)**.5

Fortran

n=SQRT(2.6590501-0.011944106*x**2+0.02185629*x**-2+0.0011761807*x**-4-7.8567029e-05*x**-6+8.1413835e-06*x**-8)

MATLAB

n=sqrt(2.6590501-0.011944106.*x.^2+0.02185629.*x.^-2+0.0011761807.*x.^-4-7.8567029e-05.*x.^-6+8.1413835e-06.*x.^-8)

LaTeX

n^2=2.6590501-0.011944106λ^{2}+0.02185629λ^{-2}+0.0011761807λ^{-4}-7.8567029\text{×}10^{-05}λ^{-6}+8.1413835\text{×}10^{-06}λ^{-8}