C

n=sqrt(1.893400242-0.003349425*pow(x,2)+0.004418653*pow(x,-2)+0.00108023*pow(x,-4)-0.000067337*pow(x,-6))

Python

n=(1.893400242-0.003349425*x**2+0.004418653*x**-2+0.00108023*x**-4-0.000067337*x**-6)**.5

Fortran

n=SQRT(1.893400242-0.003349425*x**2+0.004418653*x**-2+0.00108023*x**-4-0.000067337*x**-6)

MATLAB

n=sqrt(1.893400242-0.003349425.*x.^2+0.004418653.*x.^-2+0.00108023.*x.^-4-0.000067337.*x.^-6)

LaTeX

n^2=1.893400242-0.003349425λ^{2}+0.004418653λ^{-2}+0.00108023λ^{-4}-0.000067337λ^{-6}