C

n=sqrt(10.6409+0.3788/(pow(x,2)-0.1232)+7090.7/(pow(x,2)-2216.3))

Python

n=(10.6409+0.3788/(x**2-0.1232)+7090.7/(x**2-2216.3))**.5

Fortran

n=SQRT(10.6409+0.3788/(x**2-0.1232)+7090.7/(x**2-2216.3))

MATLAB

n=sqrt(10.6409+0.3788./(x.^2-0.1232)+7090.7./(x.^2-2216.3))

LaTeX

n^2=10.6409+\frac{0.3788}{λ^2-0.1232}+\frac{7090.7}{λ^2-2216.3}