How can i implementing a formula for spectrum in labview?

[AnnihilationSpectrum]

Hi, I'm new in Labview.  I work as an intern. I have a formula for fitting a spectrum. The left side of the spectrum is higher than the right side. There's a background on the left side.I need to lower the level of the left side to the right by applying this formula. It should be a Gaussian curve.  I need help. Who can help me?