Was going to ask the same question today before I searched the forum and found your request. I want to calculate Heat Index. The formula looks like this:
HI = -42.379 + 2.04901523*T + 10.14333127*RH - .22475541*T*RH - .00683783*T^2 - .05481717*RH^2 + .00122874*T^2*RH + .00085282*T*RH^2 - .00000199*T^2*RH^2
HI = Heat Index
F = Temperature
RH = Relative Humidity (as a percentage)
Since the exponents are all squared I can just replace them with this:
HI = -42.379 + 2.04901523*T + 10.14333127*RH - .22475541*T*RH - .00683783*T*T - .05481717*RH*RH + .00122874*T*T*RH + .00085282*T*RH*RH - .00000199*T*T*RH*RH
Not to figure out the actual expression on the Facer Creator...