C

n=sqrt(1+0.00055+0.19800/(1-pow(0.050/x,2))+0.48398/(1-pow(0.100/x,2))+0.38696/(1-pow(0.128/x,2))+0.25998/(1-pow(0.158/x,2))+0.08796/(1-pow(40.50/x,2))+3.17064/(1-pow(60.98/x,2))+0.30038/(1-pow(120.34/x,2)))

Python

n=(1+0.00055+0.19800/(1-(0.050/x)**2)+0.48398/(1-(0.100/x)**2)+0.38696/(1-(0.128/x)**2)+0.25998/(1-(0.158/x)**2)+0.08796/(1-(40.50/x)**2)+3.17064/(1-(60.98/x)**2)+0.30038/(1-(120.34/x)**2))**.5

Fortran

n=SQRT(1+0.00055+0.19800/(1-(0.050/x)**2)+0.48398/(1-(0.100/x)**2)+0.38696/(1-(0.128/x)**2)+0.25998/(1-(0.158/x)**2)+0.08796/(1-(40.50/x)**2)+3.17064/(1-(60.98/x)**2)+0.30038/(1-(120.34/x)**2))

MATLAB

n=sqrt(1+0.00055+0.19800./(1-(0.050./x).^2)+0.48398./(1-(0.100./x).^2)+0.38696./(1-(0.128./x).^2)+0.25998./(1-(0.158./x).^2)+0.08796./(1-(40.50./x).^2)+3.17064./(1-(60.98./x).^2)+0.30038./(1-(120.34./x).^2))

LaTeX

n^2-1=0.00055+\frac{0.19800λ^2}{λ^2-0.050^2}+\frac{0.48398λ^2}{λ^2-0.100^2}+\frac{0.38696λ^2}{λ^2-0.128^2}+\frac{0.25998λ^2}{λ^2-0.158^2}+\frac{0.08796λ^2}{λ^2-40.50^2}+\frac{3.17064λ^2}{λ^2-60.98^2}+\frac{0.30038λ^2}{λ^2-120.34^2}