C

n=sqrt(2.80333+0.94470*pow(x,2)/(pow(x,2)-pow(0.3004,2))-0.00714*pow(x,2))

Python

n=(2.80333+0.94470*x**2/(x**2-0.3004**2)-0.00714*x**2)**.5

Fortran

n=SQRT(2.80333+0.94470*x**2/(x**2-0.3004**2)-0.00714*x**2)

MATLAB

n=sqrt(2.80333+0.94470.*x.^2./(x.^2-0.3004.^2)-0.00714.*x.^2)

LaTeX

n^2=2.80333+\frac{0.94470λ^{2}}{λ^2-0.3004^{2}}-0.00714λ^{2}