C

n=sqrt(2.63768374-0.0104781511*pow(x,2)+0.0239749005*pow(x,-2)+0.00192856512*pow(x,-4)-0.000366733662*pow(x,-6)+7.71499779e-05*pow(x,-8)-7.4649885e-06*pow(x,-10)+3.25251898e-07*pow(x,-12))

Python

n=(2.63768374-0.0104781511*x**2+0.0239749005*x**-2+0.00192856512*x**-4-0.000366733662*x**-6+7.71499779e-05*x**-8-7.4649885e-06*x**-10+3.25251898e-07*x**-12)**.5

Fortran

n=SQRT(2.63768374-0.0104781511*x**2+0.0239749005*x**-2+0.00192856512*x**-4-0.000366733662*x**-6+7.71499779e-05*x**-8-7.4649885e-06*x**-10+3.25251898e-07*x**-12)

MATLAB

n=sqrt(2.63768374-0.0104781511.*x.^2+0.0239749005.*x.^-2+0.00192856512.*x.^-4-0.000366733662.*x.^-6+7.71499779e-05.*x.^-8-7.4649885e-06.*x.^-10+3.25251898e-07.*x.^-12)

LaTeX

n^2=2.63768374-0.0104781511λ^{2}+0.0239749005λ^{-2}+0.00192856512λ^{-4}-0.000366733662λ^{-6}+7.71499779\text{×}10^{-05}λ^{-8}-7.4649885\text{×}10^{-06}λ^{-10}+3.25251898\text{×}10^{-07}λ^{-12}