C

n=sqrt(4.9856+0.15266/(pow(x,2)-0.06331)-0.02831*pow(x,2)+2.0754e-6*pow(x,4)-1.2131e-6*pow(x,6))

Python

n=(4.9856+0.15266/(x**2-0.06331)-0.02831*x**2+2.0754e-6*x**4-1.2131e-6*x**6)**.5

Fortran

n=SQRT(4.9856+0.15266/(x**2-0.06331)-0.02831*x**2+2.0754e-6*x**4-1.2131e-6*x**6)

MATLAB

n=sqrt(4.9856+0.15266./(x.^2-0.06331)-0.02831.*x.^2+2.0754e-6.*x.^4-1.2131e-6.*x.^6)

LaTeX

n^2=4.9856+\frac{0.15266}{λ^2-0.06331}-0.02831λ^{2}+2.0754\text{×}10^{-6}λ^{4}-1.2131\text{×}10^{-6}λ^{6}