Trendline equation

Hi, I am attempting to find an equation to fit a curve that I have plotted in Excel. I use the trendline function and get an equation but when i place that formula in excel and with the values they are different. I have attached the spreadsheet to show you. The yellow columns are my original data. The blue columns are the numbers i get from the trendline equation. My R-squared value is 1.0 for both too. Any help is beneficial thanks.

Select each of the trendline equation boxes in turn and change the format to Scientific with 4 decimal places.

Select D3:I4 and format the same way.

Select D3:I3 and paste =LINEST(E10:E33, C10:C33^{1,2,3,4,5}). Then hold down the Ctrl and Shift keys and press Enter and you'll see the same coefficients as the first trendline.

Select D4:I4, and enter =LINEST(D10:D33, C10:C33^{1,2,3,4,5}) as above to see the second set.