Reference Input Excel Multiple Regression

Hello everyone,

I am currently having issues doing a multiple regression in Excel, the only issue I have is that the independent variable (X) columns are not next to each other. For example, in the "Data" -> "Data Analysis" -> "Regression" screen:

Input Y range: $B$150:$B$174
Input X range: $D$150:$F$174

This will yield a satisfactory result, the regression is successful without errors.

However, in my case the X columns are not next to each other, so I have to alter the input in the "Regression" screen:

Input Y range: $B$150:$B$174
Input X range: $D$150:$D$174+$E$150:$E$174+$F$150:$F$174

When I use this reference, Excel claims "the reference you typed is not valid...".

What is the correct way to refer to X variables in a regression in Excel which are not next to each other in a table?