It’s not clear that your desired operation makes sense.
What would you expect the result of “adding” these tensors together to be?
You start with 8 * 55 * 110 + 8 * 20 * 40 individual numbers, but you
want your result to consist of 8 * 75 * 150 individual numbers – many more.
Where are all these extra numbers supposed to come from and what should
they be equal to?