Note that you can add data (e.g. a .mat file) to your question using the paperclip symbol. Without it is is difficult to validate the process.
To give you an idea on how a for loop could look like:
% EDIT, updated the routine after the OP provided example data
NetCh = readtable("https://nl.mathworks.com/matlabcentral/answers/uploaded_files/1190448/NetCh.xlsx")
% skip 1 column as it seems to be the vaiable name
numVar = size(NetCh,2)-1;
yPeriodFor = (1:9)';
% create an array to save the results
Der = zeros(numVar,1);
for i = 1:numVar
% extract the current column
% +1 to skip the first column
currData = NetCh{:,i+1};
% do the processing
Hangal = currData.*yPeriodFor;
Haliun = yPeriodFor.^2;
% evaluate the sum's
Tr = sum(yPeriodFor);
Br = sum(currData,'omitnan');
Hr = sum(Hangal,'omitnan');
Qr = sum(Haliun);
% evaluate and save the result
Der(i) = Br*Qr-Tr*Hr;
end
% display the results
Der
